My coach has never been to Newmar since it left the factory and it's been to Spartan only 3 times (they are fantastic though) for the cooling fan recall and alignments. I've done literally every other thing on it from crankshaft and accessory drive seals to A/C repair and everything between (though I'm fortunate to have the shop and tools to do it all in.) I don't believe ANYONE will take as good of care of your coach as you will.
That said, if I'd known then what I know now, I'd have made the trip to Newmar to get my driver's side window (it's a massive reverse L shaped, irregular size -- the stationary side, not the power side) replaced and let them deal with the headache. It's the only window I've had to replace in this coach (replaced many in previous) due to fogging. I contacted Newmar and they of course wanted $1,600 for the window. I called Atwood, the manufacturer, they wanted $800. It's not a typical window, so they had to get the materials and make it. Once I knew it was on the way, I set off to replace it. The overhead cabinet was blocking the whole row of top fasteners... so, after removing the vallance, support, motorized blinds, etc. there still wasn't enough room, even with a tiny 90 degree drill attachment. I was left with the choice of fooling with removing the whole overhead cabinet, disturbing all the wiring running over the top of it, or cut an access hole in the panel inside the back of the cabinet. Because that wouldn't be seen unless the cabinet was open, I opted for that route.
I got the window out (with the help of industrial glass suction cups and my scissor lift) and the new one arrived the next day. Much to my dismay, the new window was trashed. Atwood unfortunately just tossed this heavy window into a cardboard box with no packing material and the frame and edges were destroyed in transit. I'm only a couple of hours from Elkhart, so I asked Atwood to make a new one and I'd come pick it up in person -- they obliged and even refunded the shipping costs to offset my own.
Got the new window home... wouldn't fit!! Relatively close, but not nearly close enough. I started to make comparisons to the original and noticed the original was even more irregular than I'd thought. I got the blueprint for the window from ComNet and started making comparisons -- the new window was dead on to the blueprint, the original one slightly off. I contacted Newmar to see if the design had been changed/re-used later on; it wasn't. They said it should fit and I said it wouldn't without modification to the opening. They of course advised against that.
I then compared the first (damaged) replacement window assembly to the second and they were dead on. I contacted Atwood and explained the situation... they said they could make a new one, but it would be made identical to the other two.
So, the theory I rolled with is that the original window that went in my coach was off and Newmar cut the opening around that. The only way a new window would go in that hole was to modify the hole. So, I begrudgingly spent the next 2 days carefully die grinding and putting that window in and out and in and out until it was a perfect fit (or as close to as possible.)
The next challenge was the fact that Atwood included and recommends (and I do too) butyl tape instead of Newmar's dense foam tape. The thickness of the opening (which I didn't modify) was different from the front and back due to the support for the beginning of the a-pillar. So, using butyl tape would have left a very slight gap I wouldn't have been OK with. I contacted Newmar and they said this is one of the reasons they recommend the foam tape, so I ordered that, peeled the butyl off and replaced. The window fit great and went back together at that point. Some ProFlex, profanity and LOTS of vacuuming of grinding dust later, the project was complete.
Moral of the story? If I had it to do over again, I'd have taken it to Newmar and spent $3,000 letting them deal with the hassle and Atwood! I can't even imagine the hackjob a typical RV dealer would have done, but in hindsight, I'd have been ok with letting Newmar take a stab at it and saving myself a solid week of grief and frustration!
As an aside, I did contact three companies that do the RV fog repair. None wanted anything to do with the window as it was too likely to be broken and too complex to repair.
Sure seemed like it would go smoother in my head!