Hello everyone. I am working on a University Project where I need to modify this STL im going to attach. I have tried everything, Used Meshlab to reduce number of faces to 20k, used netfabb to solve errors and used fusion360 and meshmixer but still I cant modify it. I just need to make a few holes, so I decided to scale it, print it and make the holes once it was printed. Now I put this file on Prusa Slic3r and it wont let me print it either. I need to be able to modify this for my semester final project and I am desperated because not even my teacher was able to help me after hours of working together and we dont know what to do.
I would appreciate any help