Congratulations. Sounds like you have things under control. Luckily the sandwich design of the bulkhead used by S2 is a good one. It provides a sacrificial smaller piece that is easily replaced if the leak is tackled early, avoiding the need to fix the main bulkhead, which is trickier. However, the design still allows your to repair the main bulkhead with good cosmetic results, as the smaller piece will hide the repair. This is a lesson for all S2 owners with a similar set up. It pays to tackle the job earlier rather than later. It also pays to keep your chain plates maintained, a job that I plan to tackle ASAP, since my bulk heads were repaired by the previous owner, but I don't trust that he re-bedded the chain plates properly and I know that he didn't do them all. I am running out of time up north though. Life has been complicated lately with a 5 week bout of flu and pneumonia followed up by the passing of my Father last week.
BobM