Dave recs a standard servo I am using jr 531 they are 45 oz on 4.8 volts I am running a 6 volt system so that gives me about 57-60 oz on the ailerons. I am running an 8101 on the pull pulll elevator that is a 90 oz servo on 4.8 and last a Jr 8411 on the rudder at 155 oz at 4.8 volts. The hitec 225 are a very fast servo small and light you will be fine with 4 of them on the ailerons check them often to make sure you have not lost one of the ailerons, as I just lost one 225 on my funtana throttle a few weeks ago and the throttle is not asking allot of a servo. I am also running one on the funtana choke this is the 225 mg. It’s at hitec for repair.