When we made the pontoons for BaanLoiNaam, I made sure that all of the pontoons were built (and mounting holes drilled) using the same jig so that they would be interchangeable. I noticed the jig rusting on the ground the other days and asked the workers to clean it up and add another coat of anti-rust coating:

It will be important to find a good place to keep this. If any of the pontoons spring a leak in the next few years, I want to be able to build another pontoon using the same jig and have confidence that it can be dropped in to replace the bad one without issue.