Desktop Arbor Press - modified base

Modified the base to accept two bolts, instead of having the threads as part of the model. This was the weakest point, and broke for me shortly after printing. This way, the bolts can easily be replaced if they break, without having to reprint the entire base.

Modified the bolts to be printed horizontally to give added strength where needed. I had trouble with Cura not adding supports, so I added a support bar right in the model.