Beefy Arms repack

I repacked Beefy Arms with a mirrored arm and flipped so they might print good. Not tested yet.

I plan to print some for myself and attach them to my PC, fridge, dog, etc. I couldn't find both arms ready to print anywhere, so I made this with about the same amount of effort as I spend drinking a coke. This said, give credit where it's due, http://www.thingiverse.com/atartanian/about, who mad the beefy arm starter kit.