Thanks to both of you! This is my first airstream, first trailer remodel, and a host of other firsts. To give you some idea, I've never worked with rivets before but now have a frame off project
Martin, your example is almost exactly what I want to build. I already have the black tank installed but otherwise the same. Pelland is a supplier I hadn't found and the stepped pan they offer is the first I've seen. Thank you.
Geocamper, I had no idea that AS factory would sell stuff like this. Thank you for the tip. I'll have to re-evaluate many plans with this as a possibility.
Both, I'm lucky enough to live near Blue Moon Caravans and Kent was good enough to take a look on Thursday. He's got an idea to have a stainless steel pan fabricated & then use ss sheeting on the walls. it's a few hundred bucks more than the pelland pan but will allow integrated transition, a built-in seat over the wheel well, and other custom features in a single waterproof unit. Seems like the way to go. Thinking I'll use either red guard underlayment or similar. Any holes you can see in that plan?