Thanks for the tutorial, @Shelby! I'll know better next time. Maybe. 
More information or comments on boudin are welcome, of course! Right now, however, I want to note a trailer refinement we made yesterday for those who consider the trailering life. Way back here, I wrote about upgrades to our rear screen doors. The clear vinyl covering from the screens, once removed to allow air in, wouldn't stretch back to quite fit the space. There were always wind gaps, and adjusting air flow through the back doors was dificult. We replaced the vinyl with polycarbonate panels cut to fit. They adhere to the original door screen frames with VelcroTM, as the original vinyl covers had. We purchased and installed the VelcroTM after getting the polycarbonate cut to fit.
Well, they most of the time stick to the screen frames. I've written at least once recently about an almighty crash in which a panel or three has blown out and dropped to the floor. No damage so far, though it scares the heck out of anyone in the room.
We think there must be different sizes or grades of VelcroTM: larger hooks and loops, or smaller hooks and loops, and that they need to be matched properly. There appears to be a mismatch between what we put on the window panes and what was already on the screen frames. Either that, or the hooks are already getting loose. The upshot is that panels have been falling out more frequently. My darling got the bright idea to install storm window hooks. It looks good, and nothing will fall out anymore.
I made a padded folding set of sleeves for window panels when they aren't in place. They had too many sharp edges to leave them lying around loose, and we don't want the polycarbonate to scratch someone or get scratched. I'd been using pillowcases before now.
We figure with all this engineering and modification, we should make a killing selling modification kits! 😀
