Your pictures are amazing! I am especially interested in your door rehab. While your trailer may have been in rough shape when you got it, you are clearly on your way to a pristine nicely optioned unit.
It seems a shame to suggest this, after all the work you put into your vent, but one of the better mods is a powered fan vent. Like a Fantastic vent, (http://www.fantasticvent.com/
) or other models. It's like half as good as air conditioning
, with 1% of the power draw. It requires a 14" vent, as opposed the 9" vent that both my 1300's have. I put a powered vent on one of my 4500's. They rock. After patching up the hole for the furnace
on the Cantaloupe, I plan to put a 14" hole in place of the 9" vent it came with.