About This File
These take a long time to print and can be fiddly with all the screws. However, once printed out they are so easy to put on and take off.
Although I have made eight holes in the back plate, four screws are fine. They are extra in case of thread failure in the ring. You will need 4x3mm screws for each hemi plus 4xM2x6mm screws. They are for 100mm diameter hemispheres, either the clear plastic ones or the steel ones from China should be fine.
