The 75c fits Perfect! I had to dremel the screen holder a bit, it's plastic so it was easy :) The 75c screen is a bit wider, the rest of the chip fit right in, every thing! This isn't the first swap I'v done :) I used to buy 3D printed or other enclosures but swaps are by far the cheapest & easiest way to get a unique C mod :)
Thats a Bottom Feeder Boxer Clone witch I changed to a non BF'er with a Source 510 :) & a Vicious Ant 200 mod both dual battery 250c's :) Dual 20700 & 18650 respectively :)