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'm not by my printed model but when looking at the CAD assemblies I get a little over 10mm between the main journals and a little under 13mm between the rod journals. I'll have to check the washers when I get home but the bearings should be standard size. If you do have thicker washers then it could be possible to take out the middle 623zz bearing from each rod journal and just replace them with the right amount of washer to space it the proper distance.