(In my opinion only)...If your talking about where I put some black marks on this pic, the gap between gap and end of enclosure...I wouldn't worry about it. Trim work could be better cut though. I had a very small leak in mine at other corner. Arctic Fox dealer said one of the few places where 100% silicone should be OK to use.
Another subject for the shower...Twice our diverter stem/plug, (the thing you pull to have the water go up to shower head) fell off. Sort of a puzzle to fix at first. Anyway, it now has thread "lock-tite" on the couple threads it has, and no more problems so far (over a year of full timing).
Shower is one place where leaks should be easy to see. Also to clean in the little cracks back there I got a shot gun cleaning rod to fit. Maybe there is something better but that's what I've found best so far.
Any other problems???
We replaced most of our cabinets screws and couple other odds and ends. Besides that no problems.
2003 Majestic 23P... Northwest travel machine
2013 Arctic Fox 25W... Wife "doll house" for longer snowbird trips
2001 "The Mighty Dodge"... tow vehicle for "doll house"