Well dang it.. That sucks man.. I sure don't want to pull my tank down right now.. At least you are getting a new tankWaynerock,
I'm sorry to say that you may be having similar troubles... I just posted a thread on my RS250 Reefer trouble that is also having RS send me a new display tank...
Good luck to us both...
RS250 Seam Degradation & Replacement DT | REEF2REEF Saltwater and Reef Aquarium Forum