Current Parts:
most of these are out of date currently, but feel free to try them out. 
Right Hand Key Grid stl
mockup v.2 stl (current) print this if youw ant to feel, more or less, how it feels in the hand! super easy print, no need for support, print it with almost no infill! it’s not as precise as my last mockups but it’ll give you a basic feel for how the keyboard feels in your hand.