You're welcome -- it's also to keep me motivated between project time (day jobs are such a drag )Thank you for sharing all the details of your project. I'm thinking about buying the same batteries but like you've already said, finding a big enough tool box / container is a problem.
The batteries are gorgeous but they aren't as easy to work with as prismatics, where the leads are on the same side. I'll have more details of my box in a few weeks as I start the fitment process.
If looking for containers: total length of the battery is about 320mm. 280mm + 20mm of leads on each side. And 60mm diameter of course.