My second plane was a Telemaster 66, first with an OS 40 of some sort (the most basic one in those days) and later with an OS 40 with a diesel head.. It did not fly well, and nobody I knew could figure out why. Eventually, I gave the wing to someone with a Stick 40 trainer which had had its wing destroyed in a crash. That model, with the Telemaster 40 wing, flew very well: much better than either the Telemaster or the original Stick 40. Sure was ugly, though, as the Stick 40 was green and white and the Telemaster was red and yellow. I built the Telemaster with aa castering tail wheel, an experience which taught me not to do that again.
Looking back, and knowing what I know now, I suspect that my Telemaster 66 may have been nose heavy. In those days, they sometimes told us that was a good thing, and I didn't know any better then. I don't think any of the guys I asked for advice checked the CG.