You still have to go outside and push in the corners of the liner as you latch the top down. Everyone should do this. If you push in the corners every time you will not get the wear spots that are so common on the corners of the liner.
Ben, I was reading on another TC group that many run their roof fan on exhaust, with door closed, to pull in the sides while lowering the top. Would this help or hinder with an ATC/FWC?
BTW, as a FullTimer who likes to read and camp where there's no shore power, I liked plenty of ventilation. One of the big drawbacks to me with my Scamp 13' fiberglass trailer is that there is no window in front and inevitably I would wind up parked facing into the wind, so the back and side windows didn't do much -- My older Jayco 16' did have front windows and it was much nicer in that regard.
Len was using the best part of camping with a tent trailer -- Opening the whole thing up to bring the outdoors inside!
One thing I have absolutely learned reading RV groups is that there are lots of individual camping styles. Some folks are busy modifying their Scamp/Casita, etc., trailers to add a bath while others are busy ripping out their baths to get more space... I have junked a/c, fridge and converters because they were excess weight and not useful to me; others are busy adding or replacing them.