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A cradle chassis for building a 3S (or 3P) 18650 pack: three 18.9 mm teardrop bores on 21.5 mm centres hold the cells in two 8 mm end collars plus a mid saddle, leaving both terminals flush with the outer faces at exactly 65 mm so nickel strip can be welded straight across. 82 x 68 x 34 mm, with raised + / − polarity ribs above each bore alternating for series wiring, four 3.4 mm M3 clearance holes to bolt the pack into a project, and four 12 x 5 mm zip-tie slots through the 3.5 mm base.
A four-link cable drag chain with an integrated M3 mounting foot, printed fully assembled — no pins, no clips, no post-assembly. Each 32 mm link carries an 11 mm wide x 13 mm tall cable channel and an arc-slot bend limiter that stops the chain dead straight and allows 35 deg of bend, so the top run won't sag. Overall 170 x 29 x 16 mm; the foot takes two M3 screws on a 19 mm spacing.
A four-bay bench or wall caddy that stands RC LiPo packs upright, each bay 34 x 28 mm (fits packs up to about 33 x 27 mm in cross-section — the usual 2S/3S 1300–2600 mAh class) with a dedicated 10 mm rear channel per bay so the balance lead drops over a 36 mm divider wall and its plug hangs isolated from the neighbouring pack's main leads. Overall 148 x 47 x 52 mm, with a push-up window under each bay and two M4 clearance holes (4.5 mm) through the 4 mm back wall for wall mounting.
A 62 mm square, 19 mm tall adapter that lets a NEMA 17 stepper bolt into a machine face drilled for NEMA 23 — the base carries the 47.14 mm M5 pattern, the raised Ø52 tower carries the 31 mm M3 pattern with a 22.4 mm pilot register for the motor's centring boss. The hollow Ø30 core clears a shaft coupler, a 14 mm side window gives Allen-key access to the coupler set screw, and counterbores in the base bottom fully recess the four M3x20 motor screws so the adapter still seats flat.
A 44 mm square block with four through-bores (18.7 mm, on 20.6 mm centres) that holds four 18650 cells upright, parallel and bottom-flush against the bench so nickel strip lands square during spot-welding or pack glue-up. Open-topped grab notches — one per cell, in 4-fold symmetry — let you spin a cell to set polarity, and two 5 mm ears with M3 clearance holes bolt the jig to the bench; overall 68 x 44 x 26 mm.
A 95 x 70 mm catch-all tray with two compartments for keys and coins plus an upright slot that stands a phone (up to 13 mm thick with case) face-up on a raised shelf. A tunnel through the back wall feeds the charging cable up to the phone's port so the cord never leaves the dock.
A two-horn wall cleat for figure-eight wrapping an extension cord, air hose or rope, with flared post tips that keep the coil from slipping off. 120 mm wide, mounts with two countersunk screws and holds roughly a 50 ft 16-gauge cord.
A gravity-fed dual-channel dispenser that stacks 6 AA and 8 AAA cells and drops the next one into a front grab window with a retaining lip. Stands 92 mm tall on a shelf or screws to a wall through the two rear ears.