Thanks Crashley, but that one won't work on the RV-12 unfortunately. I have a simple idea for making the standard cap tamper-resistant, but a lockable cap would be better still.
Edit: On a closer reading of the description, maybe that cap would work. As I read it, it's unsuitable for the RV-12 because it's not vented, but that isn't a problem anymore with the vented tank. Has anyone used these?
Last edited by rgmwa : 02-25-2018 at 04:38 AM.