9XL/3S gearing help

I run 22/66 gearing on my FLM Maxx, but it's 4S. The only thing I didn't upgrade was the driveshafts. Stupid me. I only got a 30 second run, because the fronts twisted and the rears broke in half. I'm down till my CVD's arrive.

For 3S maybe try a 24T?

I thought the MM could do 6S if you use a UBEC. The Sept 07 issue of RC Driver has an article with a Losi 8ight Buggy, running a MM on 6S with a ACn Car8 BL motor. It does have a huge fan on the MM though. It's on page 98 of that issue.