I have a sse with the mods you are talking of doing. My personal opinion is if you are going to enlarge the elevators don’t. I added only 3/8" and with my low rates on I can fly level and go vertical with an almost perfect 90 degree with VERY little throw. The original size is all that is needed so If you add counter balancers be sure to try to keep the same surface area as before.

Built your tail feathers ENTIRELY out of firm straight balsa sticks like a funtana in fact shape them exactly like a funtana and add carbon fiber full width to strengthen the stab and remove the flying wires. Install your servos in the tail if you can. I added an inch to the rudder and cut the fin in half to get a bigger counter balancer that was well worth it. Be careful around the elevators not to go to big...

With this plane get it as light as you can. And a pumped saito 82 is the best engine if you have one. Be sure to move the firewall back 1.5-2” with the saito or she won’t flat spin nicely. If you use the saito toss the aluminum gear and get some light fiber gear like the dubro ones and drill some holes to lighten them. Use ultra light foam wheels too.

If you are using analog servos build/use yourself a aaa nimh pack to save weight.

Remember built this light. Remove where ever you can. You would be SHOCKED to see how thin I dremmeld my tail fuselage section…

I went with 225mg (metal gear) on the ailerons, 5245 on the elevator & 625 pull pull on rudder. The mighty mini servos are THE BEST servos for this plane but a good strong 80 oz servo for the rudder is best especially if you hit your rudder hard like I do. I went with the 5245 on the elevator becase (1) I had it handy & (2) it is more reliable then a 225mg. But I bet a 225 mg would be fine if you don't go big on the elevator like I did