I''ve been having a terrible time trying to get mine to work, stlll no success....is there an updated wiring diagram? I found that the seller is useless and have not idea as to how to solve some problems: 1. The z axis steppers work great individually, when you wire them together to the z motor only the left works 2. Don't know how to wire the heated bed, four wires coming out (red, blue, greenby yanschechter - Reprappers