comment: I bought the RK71 (non hotswap) around 2 years ago and I've always been afraid to mod it as I might damage some internals but little did I know that it wasn't that difficult to mod it! 
  I added 3 layers of tape on the back of the PCB, added 3mm thick EVA foam and lubed the stock red rk71 switches with krytox 205g0. The keycaps I used are XDA Profile Matcha themed keycaps which I'm really happy about, sounds amazing too!
  Total price spent on this board is at around RM250 which is approximately $62.50 USD