Is there an answer to the original question asked... does anyone know how to adjust the thickness of the raft? I want to print about 5mm of raft to completely remove the warping and shrinking that happens on corners, whether or not it stays stuck to the build plate.
Once that's answered (is it simply just not possible?). Are there then other ways to reduce the warping and shrinking?
We have the UM2 with heated bed, with larger rectangular parts, even if they stick all the way round to the build plate, we're finding it still creates a necked in section for the first 5mm or so - especially round the corners.