Some of the pictures on the product webpage don't seem to match the main product picture or the PDF. (
http://www.team221.com/upload/king_crab_detail.jpg )They apparently use the older revolution swerve design at least for this pic. (and I doubt that the new design would even work on this platform because it's so much shorter, no height for a CIM)
Also the PDF shows the input as 3/8 keyed shaft while the product picture (
http://www.team221.com/upload/revolution_pro.JPG) has a hex input.
Uploading a CAD model would explain these discrepancies I'm sure.