They work out good. The T main is virtually the same size as the M5.5. To get the sail to fit the the 5.5 mast (30') we trim off about 10" off the top. On my boat the sail fits with no mods except the foot is shorter and that carries up the leech, so compared to the stock sail the T is shorter at mid girth about 14".

I have no trouble getting it flat. My mast may not be as flexible as a T's but it's flexible enough.

The sail I have there is the sail from Athens 04. It retired to Florida and is spending it's final days puttering around the Gulf and St. Joesph's sound. <img src="http://www.catsailor.com/forums/images/graemlins/cool.gif" alt="" />