Mapping so far has been going well if not frustrating, but I think I have the jogs set so that you can scratch. settings are externalscratchwheel touch enable - map to touch of jog- jog type A max acceleration, max sensitivity; externalscratchwheel move - map to jog rotation- jog type c sensitivity 5 acceleration 0. Also on the midi preferences page set nudge and scratch sensitivity to 9. I can't do a spin back yet, but I can beatmach with the platter and it's very responsive to my movements. I don't really scratch though, so someone who does will have to test further and possibly adjust the sensitivity in controller assignments page. 1 deck down.