Am I or is AD being unreasonable?

[buckeyechemie]

After getting my Z Serial 16622 appraised, I procured a red date wheel for the purpose of swapping with the factory black date wheel. The ADs watchmaker refuses to swap the date wheel without a full service, the std service not being quoted, of course. They seem to be overly conserved that "their name" will be attached to it, and don't want to touch it unless they can assure the movement is functioning by their hands after a service.

I explained to them that I don't expect to impart any warranty on the movement, as they'd just be touching the hands, dial, and date wheel. I just want a red date wheel that changes at midnight and reinstalled hands that line up at 6:00 and 12:00. The YM is currently running +2 sec (and change) per day, having settled in from +5 when purchased about 50 days ago from DAVIDSW.

A non-rolex shop is willing to do the swap for $225 as an overnight job, and I'm not sure I want to pay $450 per service to swap and swap back.

I figure that this straightforward of a job can be accomplished with about $135 in parts from esslingers.com and the first and last minutes of a youtube video detailing the 3135 service. I am an engineer (which probably gives me more confidence here than I should have). I would not attempt full disassembly, but the dial removal looks to be very straightforward.

Is it unreasonable to ask that and AD provide a simple swap?
Is $225 a reasonable price for what should be a 1/2 hour job for the watchmaker?
Should I go the route of the esslingers "open all"?
Am I underestimating aspects of the date wheel swap by my hand?

I'm looking for informed opinions here, please.

Dave