Hobbies, learning & leisure

Fit a lens to a compatible large-format camera: configure board dimensions, rear register and lens opening, with an adjustable vertical hole offset.

Tuner button too large or thin for standard winders? Set the rectangular socket, depth and cross handle to your dimensions. For careful manual use.

Adapt a round stage opening for a glass slide: configure seating diameter, slide size and light aperture, with a supporting flange and removal recesses.

Twist a prepared thread loop containing dubbing fibres slowly between your fingers.

Lay a suitable soft feather along the groove and gently push its quill in with your own blunt tool.

Form a half hitch around the tapered tip, then place its opening over the accessible eye of a fly held in a vice.

Press three-lobed registration recesses into the soft parting bed of a two-part craft mould.

Build a pinhole camera for one sheet of your own photographic paper.

Limit sideways light with 25 deep grid cells.

Park light photo accessories on a desk: set shoe width, plate thickness and insertion depth. Broad base without electrical contacts.

Cover two eyepieces for storage: set inner diameter, separation and insertion depth.

Replace worn grip rubber: configure inner diameter, band width and base wall thickness.

Keep three picks within reach on an existing stand tube. Match clip inside diameter, height and slot width to the tube and picks.

Tune the feel: choose pick width, length and base thickness.

Mark edge score tracks: set board gap, reach and clip width. STL or 3D printing.

Store round gaming chips in three rows: configure trough diameter and length. STL or printed part.

Display hand cards in inclined rows with length, slot width and row spacing matched to cards and sleeves.

Track game values with a rotating pointer: choose dial diameter, axle bore and disc thickness.

Check game arcs: set base diameter, opening angle and arm length for your rules.

Match a dampener insert to your string spacing: set groove spacing, groove height and thickness. Soft oval part with an open centre.

Guide board-game dice over two ramps into a tray; adjust size and runout.

Three-part lens tube for manually focusing your own lens, including a matching threaded retaining ring.

Round stack magazine for sliding matching tokens out individually through the lower front opening.

Size the outside diameter and central stop for your microscope filter holder.

Two opposing slotted rails hold clean, empty glass slides upright over an open centre.

Use your elastic bands to form triangles, quadrilaterals and other polygons on this geoboard.

Read simple elevation angles using your own sight tube and plumb line.

Collect the water displaced by an immersed object.

Compare light craft items on equal-length balance arms.

Slide the flat tongue beneath an accessible model railway loop coupler and lift gently by hand to separate two unloaded vehicles.

Guide your own cleaning pads over both rail heads together.

Compare a model railway coupler with a height you select above the rail tops.

Pose lightweight desktop models in three dimensions using your own rods.

Guide a horizontal pencil at your chosen height above the table.

Move a lightweight tabletop object along a captured guide using your own M4 threaded rod.

Camera front plate with two tube-clamp jaws and a variable radial hole pattern.

Digitise negatives with a camera: configure film width, image windows and frame spacing. Print the base carrier and matching mask separately.

Rest a compatible camera battery contact end in an open cradle. Parametric STL model with adjustable dimensions for 3D printing.

Mark a short circular arc at a chosen inner radius. Parametric STL model with adjustable dimensions for 3D printing.

Prevent a round spar rolling during marking or gentle gluing. Parametric STL model with adjustable dimensions for 3D printing.

Stand a cut-to-size divider panel in a matching foot. Parametric STL model with adjustable dimensions for 3D printing.

Hinge still works but its receiver is broken? Match the socket and screw spacing to your turntable, for a suitable rectangular dust-cover hinge tongue.

Mark frets 1–12 and the nut reference: configure scale length, strip width and thickness.

Mark string centres on a nut blank: adjust width, string count and both edge margins. Equal centre spacing with side fences for repeatable positioning.

Replace a simple open tonearm rest. Match height, cradle and mounting centres; add separate felt to protect the tube. Set your dimensions, 3D print and check the fit.

Match holder length, slot thickness and bevel angle to your own flat fret file.

Lay the thin shield on the fingerboard so one fret projects through the rounded slot.

Compare string clearance above a fret with a series of known steps.

Keep fully slackened strings clear of the fingerboard.

Wind your own passive instrument pickup on a one-piece former with six pole bores.

Protect one clarinet or saxophone reed on a flat, grooved support.

This güiro board provides a textured surface for simple scraping rhythms.

This castanet pair consists of two matching shells with a concave recess and flat striking rim.

This small rainstick housing guides your dry filling over alternating sloping baffles.

This jingle ring takes six pairs of your metal jingles.

Size a carrier for your foam pads around existing dry collection specimens.

Observe a light magnetized needle aligning on still water.

This horizontal sundial is designed for your northern latitude.

The large rear fin turns this wind vane so its small arrow points towards the incoming airflow.

Configure a Bahtinov mask for your telescope tube: choose mounting diameter, slit pitch and collar height, with measuring and printing guidance.

Hold a cut colour gel in front of a small flash. Match light window and insertion gap to gel and flash head. Set your dimensions, 3D print and check the fit on the.

Attach your own white bounce card to an upward-pointing speedlight.

A five-pointed aperture with configurable disc and star sizes.

Position loose slide mount halves during film assembly. A stepped pocket supports the frame and leaves the image area open.

Mark a film leader with a custom narrow length, remaining width and transition length for your camera.

Position a paper test target at a repeatable incline. Set length, width and angle for a macro setup. Set your dimensions, 3D print and check the fit on the actual.

Position a smartphone camera over an upright benchtop microscope eyepiece.

Park a spring-loaded lens cap on your camera strap: match socket diameter, strap width and thickness. Two slots for threading the strap.

Create a lens hood STL by setting the collar diameter, length and flare, then 3D-print it for your lens.

Replace a missing round eyepiece eyecup: set mounting diameter, height and eye opening. Designed for soft TPU with a trial fit on your own eyepiece.

Keep memory cards ready to hand: configure slot thickness, card width, insertion depth and slot count. Open desk stand with finger recesses.

Centre your eye in a Newtonian telescope focuser to compare mirror reflections during collimation.

Two recessed checking grids with configurable radii and spindle bore.

Match lens seat, working distance and inspection window to your optics.

Explore visual colour mixing with your own coloured paper discs.

Compare visible lamp spectra using your own transmission-grating film.

Arrange three acrylic mirror strips in a triangle to create repeated reflections.

Two open mirror seats for your acrylic mirrors and a separate periscope tube.

Rotate two polarizers relative to one another to observe transparent plastics.

Set divider length, height and base width to suit your stereo pair and tabletop setup.

This stereoscope plate positions two identical converging lenses of your own in front of a suitable stereo photo pair.

Animate your own drawings on a paper strip.

Support your wire above a matching jar for static-electricity experiments.

This air-vortex demonstrator is an open cylinder with a small circular front opening and a rim for your elastic membrane.

Observe three-dimensional soap films in a frame sized for your dipping vessel.

Adapt the string layout of a lightweight marionette to its proportions and your grip.

Position two loose model-ship deadeyes while preparing the rigging.

Emboss individual braille dots on narrow paper strips with your own suitable stylus.

Build a counting frame using your own beads and straight round rods.

This cross-shaped solitaire board fits 32 identical marbles of your own.

Match the tile clearance and centre spacing to your own dominoes.

This open dealing shoe holds a flat stack of playing cards and lets you slide the bottom card through a front gap.

Draw a curved alignment line on your ball with your own suitable marker.

Match a soft practice ball’s height to your own practice mat.

Check the starting direction of a slowly rolled ball on your putting mat.

Compare fretboard curvature: set radius, checking width and plate thickness.

Rest a neck during string changes: configure cradle radius, height and depth.

Guide a saddle upright: set slot width, usable length and guide height.

Grip loose bridge pins during string changes: adjust fork opening, tip thickness and handle length. Flat hand puller with grip hole.

Align two model tracks at your chosen centres: set gauge, rail-head width and track spacing. Four grooves temporarily locate over the rail heads.

Compare key travel: set measuring height, contact width and length.

An open tube and removable cup for aligning small hair bundles.

Prepare exposure tests with paper width, paper length and window length matched to your strip.

Place vehicles on rails by hand: set track gauge, ramp length and guide clearance for your wheelsets.

Distribute dry model ballast with custom rail-centre spacing, hopper length and height.

Expose the rim and mask the tyre: set opening, ring width and skirt depth. STL or 3D printing.