My son broke my hand rivet squeezer yesterday while trying to muscle that last mill out of a #4 rivet. I've been thinking for a long time about a pneumatic squeezer and now I'm thinking about making the move. Problem is I've never used one, don't know anyone who has and frankly don't really know how to begin shopping for one. All I really know is they sound pretty good. Especially for one who is really tired of hand-squeezing those larger rivets. I've noticed Avery has 2 different types; a regular and an "alligator". The alligator looks like it can get into tighter spaces. I'm just getting started on an RV-7 QB. Anyone have any recommendations?