About this 3D model

PSP Go battery expansion rear shell. I do not have the exact screw information, but I've measured the length to be 15.15mm and the width and threads obviously match the originals :) Included here are 2 versions of the same model as well as the STEP of each for easy modding for those who like cool things. The only real difference between the models is that the FDM version has a chamfer instead of a fillet around the back edge for easier printing. The pictures show the FDM version.