Do you guys use standard servos on your 40 size Fun Fly and 3D planes?

I've got a 40 size Giles 3D. It's set up for dual aileron servos and dual elevator servos. Single rudder servo.

I'm using 120oz coreless in the ailerons. 70oz coreless on each elevator. And a 100oz digital coreless on the rudder.

My flying buddy is telling me it's overkill and that standard BB servos with 40-50oz will be fine.

How much torque do the rest of you guys use on a little 40 size 3D plane that weighs 5 pounds RTF?