I like the vintage design of the Casio B640 so I wanted the same thing on F91W you may wonder why on earth would anyone use put the old module 593 to replace a more advanced model like module 3294 well, because i can ;)
and is fun to build
.STEP files are also included! 3D printing settings
no support 0.15mm or lower layer height (smaller the better) A 0.2mm nozzle recommend (or use resin printer )