GPU Anti Sag Support

This was actually a model that I remixed from another model a while ago but unfortunately can't seem to find the original model. The change I made to the original was to increase the length of the model -it was ~5 cm before, now it's 8 cm(completely screwed, ~12 cm completely unscrewed)- and added a groove at the bottom so that a magnet can be glued to the bottom and it holds in place so much better. It's printing fine when printed BOTTOM on magnet hole down and SCREW on screw head d