Here is an example of the new support features that work so well with a dual 3d printer like the BB. This is a bracket for a 3d Hubs customer made in Formfutura TitanX. This material is like ABS but does not warp much at all so I can turn on the cooling fan to help with the corners. In the pics you can see how I use: ~2 layer dense base for the support areas. ~Using the same material of the part for the sparse support. ~Using the 2nd extruder with red HIPS for 4 layers of dense support only, while cooling the extruder down to 200c for the layers that it's not used to prevent ooze. ~2 processes so the top 1/2 of the part has higher density infill and a different pattern to give the thin areas more strength. ~Zero clearance between the support and the part which gives a perfect surface finish (only possible when using 2 different materials, and more effective on flat surfaces).
There's also a new setting called "Suport Base Layers" in the support tab which puts solid layers under your supports. Its a big help too. Just needs _automatic_ variable layer height changing and that ironing feature from cura
