I figured out the +4 base pad will actually hold +5 as long as you take out the little plug at the bottom of the spring. I just removed the hole in the bottom because its not needed and will let dirt and stuff in and took the 20 off the back because it holds 21 now by adding little blocks in prusa slicer. It works with the stock springs but you can contact tandemkross and get their fancy green springs if you're nice.

still needs https://www.thingiverse.com/thing:4745407 to fit securely.