Rapman 3.1 Bearing Blocks, X and Y, for dual and single head machines

These bearing blocks will encase your linear bearings snugly and securely. Never again will you have to choose between damaging your rods, bearings, and plates by overtightening the bolts or leaving them too loose and having half the nuts spin off during superfast prints. >.<

Updates from jcoffland's original:

The orientation has changed; they are now set up to print flat. This means the weakest direction is no longer along the axis of the bolts, which in previous versions could cause them