I put basswood strips down under where the mounting tabs are and used small wood screws to hold them in. I just put the servos over the open frame of the stab and made my own parts.I mounted them so they both operate from a "Y" connctor, so I only use 1 channel for the elevator..this means that one servo arm ends up closer to one of the rudders than the other one and I used metal servo arms. You can split the elevator if you want, I didn't so the combined torque of both servos acts on the one surface. Setting them up this way means that you have to be careful to mount the control horns exactly equal and have the pushrods the same length so the servos do not end up fighting each other during movement which will put an extra drain on your batteries. I used a servo tester with a built in milliamp gauge to test the servos and adjusted the linkages until I had the minimum current draw.Of course if you split the elevator this is not a problem. I also tested my setup by unplugging 1 servo and the elevator still works OK just a littke bit slower.