The mounting blocks on SM are hit and miss. There's a 50% chance they will be where needed. Feel around and find out where the block is if it's there, then see if that will allow a proper angle to where the servo needs to go in the servo bay....if not, open up the leading edge of the aileron and put your own hard point in from the front of the aileron. The ideal linkage is 90* to the hinge line.

Lather, rinse, repeat for the other aileron and flaps.[X(]