When a book-holder pattern is adapted from a thicker assembly to verified 3 mm stock, test the spacers and interlocking slots as a pair. Cutting every visible butterfly panel first can leave an attractive pile of parts that rocks or slips together. A small joint coupon and one assembled support reveal the fit before full-sheet work.
The Atomm butterfly book-holder remix describes changing a 6 mm arrangement using 3 mm basswood and added spacers. Its file is offered under a noncommercial Creative Commons license; do not copy it into a commercial product without permission. Its xTool power and speed values are not X1S 2026 instructions.
Separate thickness from slot width
Measure actual material with calipers at several places. Nominal 3 mm plywood can vary, and glue or printed surface treatment can add thickness locally. Draw a small test with a base slot, upright foot and planned spacer. Cut it from the same verified sheet and assemble by hand after the machine stops. The support should seat without splintering, fall-out or a forced bend.
| Joint part | Physical check |
|---|---|
| Base slot | Accepts the real upright and planned spacer |
| Upright foot | Sits fully in the base, without lifting it |
| Spacer | Fills intended gap without protruding |
| Completed support | Holds a representative book on a level table |
Book mass and center of gravity matter: a tall cookbook stresses the holder differently from a thin paperback. Test the intended use, then revise dimensions from the measured fit. A cut file preview alone cannot establish mechanical stability or the strength of the selected plywood.
Use the configured X1S area
The TYVOK X1S 2026 page describes an 800 × 800 mm starting setup and larger expansion path where configured. Confirm the actual setup, sheet support and known laser compatibility. Make a scrap cut test, use extraction, and watch the machine throughout. This is an adaptation workflow, not a TYVOK claim that 3 mm stock always cuts in one pass.
The A1 Mini sliding month-card test faces a related clearance question for moving parts. For larger interlocking work, the earlier finger-joint sanding allowance helps explain why final dimensions can change after finishing.
Can I simply scale a 6 mm design to 50 percent?
No. Overall height, book-rest angle and load path would change along with slot widths. Rework the joints and spacers locally, then test the complete support.
Should a tight joint be forced together?
Stop before splitting thin plywood. Measure the part and slot, revise the test coupon, and only then recut the affected component.