We installed this magnetic screen door on our Trillium
4500. It came as a 24 x 80 inch door, but we cut it down to 24x65 to fit, then ripped the seams from the unused bottom bias tape, and resewed it on the bottom.
Another modification was that we used contact cement to strengthen the bond of the velcro tape across the top of the door.
It seems to work well so far. There is a small gap across the bottom, less than an inch. We have not experienced intense mosquito season yet, so the final test is yet to come.