RE: Engine for TF AT-6
Jeff, I've flowm the TF Hollywood Zero on a Super Tigre S-61K, S-90, ASP .80 4c, and os max 1.2 4c. My asp .80 is considerably less power than your Saito .80 and it flew it on the wing just fine. It fly's it about = to a .60 2c but the bigger prop gives better landing charactoristics. I found that mine had that horrible AT-6 bounce with every engine but the 1.2 4c. I was also able to reduce it by setting my radio so that as the throttle was moved below 1/3 the ailerons on both sides would come up (spoilerons).
Good luck
Joe