Somehow missed a bunch of questions here:
@mparadis:
I have a MakerBot Thing-O-Matic. It is very old now though, small build area, and it is wearing out a bit. Only so many swapping of parts and replacements...
@scroder: You can definitely use them with a WD500Z. Not sure if it is still relevant for you, but I programmed mine to control one as the first thing.