CW switchable Cootie (Sideswiper) / Paddle

This is a CW cootie key (sideswiper) that can also be used as a single-paddle key, thanks to a selectable operating mode via a toggle switch: with the switch engaged, the dot and dash contacts can be connected in parallel to operate as a sideswiper. Sand the blade with abrasive paper to remove any coating and ensure better electrical contact; clamp the jigsaw blade between the washers, tightening the bolts carefully. Attach the semi-pads to the blade warming the blade slightly and using hot melt glue. For disassembly, simply warm the blade again. Bill of materials: 4 × M4 bolts, 20 mm length 6 × M4 nuts 4 × DIN 125 washers (inner diameter 4.3 mm; outer diameter 9 mm; thickness 1 mm) 1 × toggle switch, 6 mm diameter 1 × female jack socket, 6.5 mm thread diameter; max body diameter 8.5 mm 1 × jigsaw blade, 1 mm thickness (e.g. BOSCH U101B or similar) 3 × ring terminals, 4 mm hole diameter Printing recommendations: PLA or PETG, 50% infill (zig-zag pattern)