MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
See my response to your comment on my make. I remodeled the entire fixture in Fusion 360. I believe it is also bigger than it needs to be, with the correct spring and a very limited travel dial indicator I think the whole thing can be made 30 mm shorter. I also think that it can be made with 608 bearings instead of the 624ZZ bearings.
The idea is to build it as cheaply as possible.