I got a speech at my B&M about not having my ring on when I was using a 510 tank on my mvp. Says it provides support for the tank if it's dropped or in any way bent. I assume since he gave me a really nice ring for free that he wasn't saying it to sell me something lol. But no, I still don't think it's necessary especially if you're really careful with your stuff. It is actually necessary with my protank2's now though, the threading on the bottom of the AFC is too long so it wobbles even if it's made a connection to the battery, so screwing the ring up a bit to meet it keeps it from wobbling. So kinda glad I kept them around now lol. That handy advice was provided by the wonderful members here too.