You're welcome. I'm sure the heater has those circular side openings on the back side as they do on the front. Mine is vented directly from that side. Might be a little cramped working back there but as you might gather, its a very short duct run and the heat just blasts into the garage with such a close proximity to the heater. Just for laughs I'd take a gander at the top of the drawer frame while you're in there and make sure it looks solid.
These trailers are pretty rare but we actually saw two while on our Canadian trip. Both in Montana of all places! One was heading east on I94 near Glendive and the other was in a KOA at Billings. The folks with the rig on I94 were waving furiously at us but we never saw anyone around the one in Billings. It looked to be an "older" version and semi-permanently parked. Seemed a bit sad.
My next project for the THT is mounting my water filters in the basement. I rigged this great set up to hang them from the I beam frame just under the control panel access.(after parked) It's a two stage unit and when empty/dry doesn't seem like much but as I discovered, when full of water it probably has close to a gallon in it and no fun to sling around bent over or on hands and knees.
Keystone has been great about taking care of warranty issues and usually with some sort of nice upgrade/update. It would just be nice if it took less than three weeks to giter done!