Absurd !!! that's unacceptable. Good you found an alternative dealer, any reputable shop should be happy to do the service. Quick note on the upgrade/job itself. It takes very little time, I got mine back the next day (once the parts were in, and that only took a day).
Your reference to the upgrade eliminating most of the fatigue and brightness, depends on what else you are using really. For example, I will be leaving Bryston for tubes soon to warm and hopefully soften some of the edgy or crispyness of the upper end of my FB1s. My cabling requires some work too so....
Regardless, the '+' install is great. I've been burning mine in for a week now and every day I notice an improvement.
Nice view by the way.