Hi all,
great info in these posts.
Paul, interestingly your weight difference is similar to the difference to the guys I raced in Mossies one up. I would consider it a large difference certainly enough to be looking to a less powerful rig than a sailor 20kg heavier. I was the heavier sailor and always ran more rotation, less downhaul and traveller centred, than Tim and Neil.
Early on I was always faster the stronger the wind blew, but before I stopped sailing Mossies they where much closer and sometimes passed me upwind in strong winds, until it became extremely windy.
How did they improve performance? Probably best to ask them. But I think it came mostly from raking the mast back and learning the feel of driving to windward one up. Lower with speed not high and staggering. Which one up boat likes to do.
See thread on front page when I made this post, called Solo Sailing F16 etc. You should note Eric's reply

Regards Gary.