... along the meeting line between the subpanel and the canopy frame (where the w'strip goes), or more joints than that?
Jim,
The link above is broken...
I would love to see those pics...
I put a 3/4 inch "ramp" of proseal from the fwd skin to the tip up skin and also put a bead along the mating surface to create a form in place gasket, used vaseline on the tip up skin to prevent sticking. I think it looks good. I havnt had it in the rain yet but it looks to be more watertight than some I've seen.
http://www.flickr.com/photos/30477239@N07/3304937984/
..to use pro-seal in those periodic gaps along the top of the subpanel, and rely on more traditional w'stripping for the front edge of the T/U canopy frame. As you probably know, McMaster-Carr has a broad selection of w'strips with good detail information. Better yet, they're not expensive !!!