4x4 Rubik's cube replacement parts and improved core

I will update this with the rest of the parts, and will improve the structure of the core when i have time. Right now there is a center piece and the core, I have printed off the center pieces, they may be a tad big, by about 5-10% from my print, though I have no idea currently. I will upload photos of it more put together in the future, I just have no time now.

Update: I have added the edge piece I designed as well as the Inventor files for all uploaded parts