If you have fenders, make sure they are strong enough for your 2 biggest friends to stand on or one to fall on.
Leave gaps in your decking for the rain to drain through.
Weld at least 2, one on each side, 2x2 ID tubes to the rear crossbeam. These will serve as sockets for mast supports and things you havn't even thought of yet.
With the light front mast support, think about what you are going to stand on when you need to reach high.
It looks great.
