[grill-n-go]

"F" track for mounting hurricane panels and Loctite Depend 330. My solar panel is mounted that way. You can bolt anything you want up there.

"F" track is available at most Lowes and Home Depots in hurrican prone areas. If you are interested in pursuing this route let me know. If after discussing it you are still interested I'll be happy to pick up a track and send it to you.

As far as opening the TM with a "cargo carrier" on it, I'd say, forget it. My 2720SL has the A/C and a 27 Lb. solar panel. Even though I could open it, after having it inspected at the factory I ended up changing one torsion bar to get the right amount of lift. If I ever take the panel off I'm going to have to much lift.

You don't want a variable weight sitting on your TM's roof and if the carrier is too heavy you may need to change your torsion bars.