bobcote48 - I feel badly about my earlier comment making the door gap sound possibly worse than it really is. I would rely on CharlesOK comment - gives me reassurance. Mine probably has a large gap as well, but it is under the trim strip.
happyjack2 - I pull a trailer almost 75% of the time loaded with a motorcycle. Have not weighed it, but suspect about 1,800 lbs total. Trailer design and loading is a little more complex than hooking, loading and going. The distance between the hitch point and the axle should be twice the distance between the wheels. I suspect that some U-Haul trailer's are intentionally not correct - they have a warning sticker on them to not exceed 45 mph. The fully loaded weight of the trailer should only have between 10-20% onto the pulling vehicle. Both of these affect the pulling vehicle. Tire pressure on your 211 will also affect your ride. Our unit had way too much tire pressure for the actual weights.