Thanks Ryan! I have the Hudy as well but don't really trust it for accurate castor measurements. I am working on a little project for my MBX5R and really need to have what the manufacture intended for the min & max for the upper arm only, arms all the way forward and all the way back. I will check it today with the Hudy and see what I come up with just to see if we see the same thing.
Someone had to know this info. I will post back here if I find out somewhere else.