I've been thinking about a top for mine for a while now...just haven't got off my lazy butt yet. I doubt there are any shop drawings or specs for this kind of thing since they are all custom built and there doesn't seem to be more than a hand full out there. The one thing about stainless is it's heavy so don't over-do the bracing and crossmembers. Also, be sure your welding guy purges the inside of the tubing with argon before welding or you will get heavy oxidation inside the tubing that could lead to failure down the road. Also, I much agree with the fabric top. These V20's aren't heavy, big boats so more weight up top could make it a bit squirrelley in heavy seas.

just my $.02