Going to post this here in case anyone had similar intentions as I did.
Just so you know, Masterkeys Pro S and Rapid-i boards have upside down switches for led illumination and I found out today that they are
NOT compatible with Cherry profile keycaps. It still seems crazy to me, but I've confirmed and found other threads here and there that also confirm. So, all of those cool GMK sets I own like Skeletor, Hydro, Dolch, Hyperfuse, Monkey; and the ones I have coming later like Terminal, Coniferous, and [hopefully] Nautilus... will have issues with R3 keys hitting the switch housing and not properly bottoming out. So think twice before you grab one of those keyboards. The case is awesome. Just really pissed that I discovered the issue with the MX boards. I have no idea about the Novatouch compatibility since I sold mine a while back. Currently evaluating what SA or DSA caps I have that can replace my Dolch set in this beautiful case. Grrr. angry.
If you have a Masterkeys S or Rapid-i in this case AND you have cherry profile caps on it, do me a solid and try out the caps lock row. See if they sound/feel a bit muted when they bottom out. And don't hate me for pointing it out