Hello, I have been viewing IC and GB in geekhack for a while but forgot to register an account till now. Recently got a plan for designing and handwiring a keyboard with numpad on left (yep, inspired by Monarch), but got some trouble on picking the right controller. I think Teensy 2.0 did not have enough pin for the build, so should I pick the Teensy ++ 2.0 or the newer Teensy 3.x? If I didn't remember wrong, Teensy 3.x ahve a more powerful chip compare to the Teensy 2.0 and Teensy ++ 2.0. But how should I change my code if I want to use tmk to program the keyboard? Or is it possible I can use those arduino board and TMK to program my keyboard?