I think that the older ones handle the 5S better. None of the MMs that I bought in the last few months will do 5S. The two that I bought shortly after their release are the ones that do run 5S. The funny thing is that I blew up both of those controllers running them in my Muggy. 13lbs of truck geared at 10/46 killed them both. The repair receipt that I got back from Castle said that they needed to replace FETs.

I've been running my 8ight T tonight on 5S with the 9XL geared 10/44 with 40 series Proline Moabs. With the standard MT tires and wheels, I'm at a bit of a loss for gearing. Running 4S, I was geared 16/44 with the standard tires/wheels. I would have thought that that would have been over geared, but I'm getting VERY little cogging and only occassionally. I then tried 5S at that gearing. I thought I'd need to go down on the pinion, but I wanted to try it. It ran fine. I know the 8ight is 3lbs lighter than the Muggy was, but at least some of this has to be the result of the cap bank.