Be certain to actually check the height of the vent hole on the combo versus the wall marking. Mine is a straight shot out and just a few inches long.
When you install the vent door on the outside be aware that mine only had two screws securing it, one on each bottom corner. When I looked up from below I could see daylight through the sides. I ran a bead of sealant around the outside because I did not want air getting in that crack and the thing departing the vehicle on the road. You probably could apply the sealant as an adhesive when you first install it and it will look a bit cleaner.
Mine has a PVC drain tube sticking up in the rear corner where the drain line goes. Pay careful attention to the height and positioning of the drain line per the manual. I think my PVC piping has a P-trap, the U-shaped curve, in it but am not certain. That will keep gray tank "air" out of the cabinet.
Westland actually has optional brackets to secure the front feet to the cabinet floor to help reduce vibration. If you decide to use those, you'll probably have to run a 2x4 under the flooring panel to screw the brackets into. I was going to add those if I still had vibration issues but I don't.
https://www.amazon.com/Westland-MK01...4226605&sr=8-1
You should consider reading and saving the instructions in the thread below, which are also attached here. It's a lint cleaning procedure that is not documented in the manual, or didn't used to be. You may experience unseen lint build-up because there is no traditional lint filter that can be removed and cleaned. I got it directly from Westland over the winter. It works well. Splendide back-flushes the lint filter automatically but it's not 100% effective so lint slowly builds up inside.
If you're thinking that it's taking longer and longer to dry clothes and they're still damp, run that procedure. I can throw two heavy bath towels in the dryer, run it for 20 minutes, and they come out dry. Right before I ran the procedure, in addition to the error code I noted in the thread, the towels were coming out damp after 40 minutes.
https://www.forestriverforums.com/fo...re-201608.html
I've attached some docs you might want to save off and review.
Good luck and don't hurt your back moving that thing. You only want to put it in once.
Ray