Hi guys

Just getting started in this hobby and am putting together an ARF trainer (Seagull - Boomerang 40) and am in the process of building a Sig Kadet LT40 kit (which is taking forever due to lack of spare time to work on it). I went to the LHS today to buy an engine and a few bits and pieces for the Boomerang and the guy talked me into buying the 55ax instead of the 46ax which I was thinking of doing anyway. He picked up an APC 13x6 prop from the shelf and said that that's the one I want. But just having a quick look around the forums, it looks as though it could be too big for the 55ax? Will it be OK or should I swap it for something else?

Also any tips for setting/running in the 55ax?

Cheers