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.
I like your basic design... I'm going to build one, then see if I can figure out how to make it a bit smaller... the goal would be to get it down to about 20-25mm diameter if at all possible to fit my Frankenlab Mill. I'll be doing a video on probes shortly... and feature your design if i can.