I like your new engine very much but it seems that there is a couple of problems I encountered on my Rostock Max.
First is that if I choose Run first run wizard ant than choose option Bed center is 0,0,0 (RoStock) objects in viewport are not centered. It is not fatal but it is annoying.
The second one is that it seems that dual extrusion is broken. If you generate support to use second extruder it shows support in different color in viewport as intended, but if you load G-code in Repetier it shows that everything is actually printed from extruder 1.
Any help would be appreciated.
EDIT: I should add that SLICED objects are not centered in viewport.