Our T6 has a poptop, with a solar panel bonded directly to it. The panel has failed, but we can get a replacement under warranty. However, getting the panel off the roof is not covered by the warranty, and my conversion company say it's impossible without causing damage to the roof. They suggest bonding the replacement panel directly on to the old, failed panel. I'm reluctant to go down this route, as I fear developing a rising stack of failed panels is inevitable? Any suggestions?