Here is a link to detailed assembly instructions for the stock ReliaBuild 3D extruder for both Single and Dual heads. These instructions apply to extruder upgrades for the RB1and RBB and when porting over the guts of an RB2 to the new RB3 or RBB3 frame.

The effectiveness of the dual head leveling is based on a machine that has milled aluminum parts for the carriages and bed resulting in very flat surfaces and travel.

Let me know what you think!
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