RE: vectorflight extra300 or edge540
I have the 58" Extra and had the MDS 78 on it, later I swapped that for the Saito 91 and man it came alive. The sound and pulling power was awesome. Flew great and took alot of punishment.
If I were to do it again I would go with the 66" version and put a 4 stroke on it like the Saito 100 or YS 1.10.
VF is a great company to deal with.
try the SEARCH feature and look them up here, many threads with info for you to check out
matt