I'm aware of at least three that exist. there was a 96 in AZ I almost bought, and I saw another one also far away rom me.
These were not designed with rain in mind. They have flaws that can be remedied easily, but if not addressed the boat-like nature of these becomes a bath tub and holds water until the floor rots, then still holds water. I am guessing other fiberglass TCs either have drains or wood floors.
The refrigerator vent door leans in, as the whole side does, and the floor of fridge compartment is well below the bottom of the vent opening. there are a few holes for propane lines and electric so any water is free to enter the space between the floor and the outside of the camper. This is an easy remedy, but has to be done.
I imagine most of these got wet and then taken to the dump. It was quite a project cutting the bottom of the fiberglass camper out to rebuild the sub floor, and not economically viable if to pay a repairman.
This window I am working on was cut too small when I got it. The old glass barely was tall enough to span the gap between the frames, something I did not know as I was tracing and cutting a new piece. This was another water leak. Then I cut new glass painstakingly sanding it smaller to be sure I had a perfect fit. All I have is car windshield glue to put it back together, so when I replace the plexiglass in the future it will have to be a new frame at the same time.
The plexiglass cut easy on a bandsaw without harm.
I may try with the scrap on a table saw just to see, hard to cut straight on bandsaw.
I am reusing the old trim rubber. Too late to order and wait for parts.I put in a thicker plexiglass and this looks to fit better and work with the trim better. The glass is clear, not tinted, so we will see how I like it - may regret it, may not. I like to be able to see out at night, so could be best option.
**update edit, I have not driven in the rain, but many rain storms and no leaks on front window.