[Zzorro]

I think the Porsche design for the coolant tank is terrible, especially considering that these fail. I had to change the tank (like many others) with the engine in the car and I can say without hesitation that I would rather redo my entire suspension that do the coolant tank again.

I think you might benefit by installing barbed quick connections at the bulkhead to allow for simple future tank replacement. Certainly you have the a ability to do so now pretty easily.