Tahoe
No I am building a Series 5. The tanks I have are sealed with Kreem (says so on the tank) and this stuff is notorious for peeling in ANY type of tank whether it is steel, plastic or FG.
The comment you made is precisely why I am stripping out the Kreem. It will fail. No doubt in my mind. I would much rather get this fixed now than deal with flushing a tank mounted in a wing.
What are the SS7 tanks lined with?