This is a 65% layout with a numpad and a rotary encoder. Parts you'll need for this include:  3.5 mm brass heat inserts for screwing in plate to the case and M2*6 screws. I personally didn't use any stabilizers in my build other than one 6.25u plate mount Durock stab for my spacebar. to complete the build you'll need other keyboard essentials like diodes (i used 1N4148), some thin gauge wire like 24 AWG, a microcontroller (i used a pico 2040), an EC11 rotary encoder and knob cover, and some keycaps and switches. (You can also fit both halves of each part on a bambulab p1p/p1s/x1c if you dont want to print each half one at a time)

Let me know if you have any questions, enjoy!