Took me a bit to remember to post this, but heres the CAD files for the grinder i built:
https://www.dropbox.com/s/7tzewzym96...20v8.step?dl=0
I borrowed fairly heavily from these plans:
http://dcknives.blogspot.com/p/2-x-72-belt-grinder.html
Though i did tweak things a bit, namely making the tensioner mechanism a hinged arm, rather than the shaft arrangement. I also decided to rework the drive wheel mechanism, the drive wheel in mine sits on a shaft fed through 2 bearings and driven by a pulley since i prefer belt to direct drive. Admittedly, the CAD files are missing a lot of hardware, but the pictures of the finished unit should help to fill in the blanks: