Hello, I very recently acquired a '94 Excella 28', and now I'm busy assessing its needs and giving it a lot of TLC, and also considering any modifications that I might like to do.
In the meantime, here's a link to a photo album of my first camper that I just completed. I started with a Harbor Freight-style frame (bought before HF ever existed), and proceeded to build the camper from cedar wood and 5mm birch plywood, rigid house insulation, and canvas, plus paint an glue. It was an adventure, and it tows beautifully.
https://photos.app.goo.gl/RXcPVzH7K6mBsMR83