I changed the tail feather hinges out to Sig ones cause they don't have the gap and are a little thicker. I also added 3 more hinges for a total of 6 to the rudder. For the ailerons I used the stock hinges and setup. The engine I'm using is a 160FX. Be sure to check the rudder travel before gluing it in as mine interfered with the fuse sides a bit.