Hello Guys:
I gots me one o' doze. It is partially assembled by someone else. I will eventually get to it. However there was a lot of issues with broken elevators. The kit's elevator is built up and sheeted. The fix usually was to glass the surface. I think if the sheeting was upped 1 size would suffice. Otherwize selecting hard balsa might work. I recall this was one of the fixes. My mind is getting mushy with age. So I cannot remember all of the fixes. As I recall the strapping tape with the strings in it was also used.
However you guys do it I reccomend you beef up the horizontal stab. I hope this helps.

M Shuman