I can't describe how satisfied I am right now, It took around an hour to replicate and extend my current layout with the usb_to_usb converter - I initially bought the converter just in case, but I don't think I will build a custom ps2_to_usb converter for NKRO, as I'm mostly at 4KRO myself
Used keymap_hasu.c as a base, I'm at 91.52% usage, so it's a bit concerning
Might be great if you re-built this usb_to_usb converter with a larger microcontroller
Is it safe to flash the converter with the keyboard connected?
It usually works, but one time the converter got stuck, likely with a mouse_click_hold too (so the mouse didn't work, things kept getting selected), the only way to re-engage was to re-connect the converter, but usually, things just start working after the flashing
(I will likely start spamming the tmk thread and maybe the issue tracker soon)
Checked for a donate link but couldn't find one, might be a good idea to add one to github, if it's going to help the development that is
Edit: The only issue I had was with the leds, they didn't turn off, I'm not sure whether this is an issue with the PCB or the converter, in any case, I ended up turning them off, simpler - I have to say, tmk_keyboard is sooo soothing after dabbling with the infinity firmware for a long time, adding a SHIFT_ESC override took 2-3 minutes, I'm slowly adding overrided modifier behaviours, yet my layout is more like FN5 FN6 FN12's instead of Q W A S D's right now