Wanhao D7 Easy Level Build Platform with Resin Drain

A while back another user posted an easy level build platform that this is based on. The original is not on Thingiverse any more, so I can't give the original designer their credit, but I would if I could.

This platform is mainly based on theirs, but will fit v1.5 machines (The original was too big in the Z axis) as well as earlier machines. There are also two versions of the bottom part, one to fit the original build plate, the other to fit the v1.5 build plate. The design incorporates bevel