I have one of Yip's Mint protractors coming as well in the post as we speak.
I am used the wally tractor on my old VPI JMW 12.5, however that is useless now that I have teh 12.7.
Anyway, it will be interesting to see how the mint goes vs the Graham Phantom jig alignment
Tim, sounds like you and your soundstage buddies need to do a comparison of several alignment protractors like the wally, mint, ken willis, db, freikert etc and publish it in soundstage.
Use your table/arm and someone else's. It would be interesting reading on the positives and minus's of each.