Hello
So let's play civil as possible, there were a few posters that are close to being deemed a troll around here
SO on that note, OP I will give this advise, the folks that I know and have met on the road DO NOT like front loaders
These are 5th wheelers and RV'ers
The reason I keep hearing is that the vehicles "flex to much" which cause the seals to wear/rub or just not seal because the surfaces are not square after leveling home (forcing the body to twist with jacks and drive up on blocks)
They seem to be fine if installed in level driveway and the camp spot is the same
With that I will also add any combo unit is junk if you wash more than 2 pairs of socks and underwear at same time, they will not dry 2 pairs of jeans
As to how much flex do we have? front to back the frame is very strong to up/down loads and side loads/impacts
BUT, if they were stiff they would crack in the middle or at suspension mounting points
if you drive up on a block with say right front and left rear, that would twist body enough to not allow interior doors or cabinets to open and close, this is one reason being level helps when camping
We have a wall separating front/back living areas, it is setup like a home door clearance wise, depending on road/lot surface we have had it so door can not open or close, so we look to see what is low or high and we d=add blocks under tires to fix it
Just things to think about
I wonder if keeping a thin layer of KY jelly on the seal would help?