Mike, I see you have two different bevels i take it you have two different chisel types. I have got some pipe don't know weather to clamp to single pipe and ajust high for angle or two pipes two keep set angle. The iron angle is different. I'll play with it and see.
My two different angles were to allow for chisels and plane irons. The back of a chisel not being parallel to the front meant, and the fact that my 3 or 4 different chisel types are all different, meant that having a choice of angle seemed a good idea.