I have GWS beaver, Estarter, Mustang and formosa(not built)

I had this problem on some planes I fixed it by adding a slight strip of aluminum to the elevator. It is very easy to do and you can get it at Home depot or lows as roofing flashing. Glue on w/ a little epoxy and it eill be very tough. I also used this to correct problem with breaking rear stabs and horz stab. By bendinr small pieces at a 90degree angle and gluing down. If you have plenty of power, you'll never feel it.

Joe