Hello, I've made an adapter plate to mount the Arduino Mega and Ramps board to fit into the original CR-10 box. As it's only screwed on one side, i made a cuboid on the other side to tape in the box with double sided tape (i used 3M tape). For printability i made two parts to print it flat. So the cuboid need to be super glued on the big part, then put double sided tape under it.
Credits to "archistrong" for his great and exact ramps 3D Model!