You won't have much luck reefing that main. Because these mains hook at the top you can't really reef the main. The problem is the main will pull out of the comptip track when it's reefed. Only thing you could try would be to install a second hook but I doubt that will work.

If you just tie a line to the top of the main that will hook on the top of the mast, the main will pull right out of the mast track.

Also releasing a main and getting it to rehook in big seas and big wind is a recipe for problems. Only way I would do it is if I pulled up on land to make the change.

I owned an H20 for a number of years.