Thanks Phil,
I'll pass this along to our canvas guy. Fortunately for me there are two of them in my trading circle so there will be no cheque written.

I'm rewiring his houseboat and refurbishing the exhaust system on his dad's (also a canvas guy) trawler. They are making isenglass panels and screen panels for our full enclosure and the stack packs. Our sails are footed to the boom with slides and our plan is to intersperse some lugs on the stack packs. Single line reefing in line with the boom won't interfere with the lazy jacks or packs.
They sewed our top for us. I built the frame. So far this is the absolute best solution to a top for a c/c 40 I've seen (if I do say so myself).

With the enclosure it's going to make for a very comfortable cruiser.
George