RE: Upgrading the fuel tank on std Revo
Good luck with that. I also thought I really needed the reverse and it is great in certain situations, especially when bashing. Since changing to FOC, I have ended up changing my driving style a little to suit and out of the numerous bash sessions, I think I have only really wanted/needed reverse on a couple of occasions. You'll be amazed how much weight it saves too. Another bonus.
Oh and forgot to mention that my issues with sometimes having no throttle have also gone, obviously the opti-drive was trying to do it's thing and I ended up with no throttle on numerous occasions for a few seconds.