Fastlash,

The FMA s90 is the smae as the Cirrus cs-21. I had a set of the S90's and they were great. My racing buddy has at least a dozen of the CS 21's and has had good luck. Perfect no, but at least as good as anything out there. I just picked up another set ot the CS 21's at my LHS this week, They have them for $15.95 ea... really good buy! I run mine on the old style duralite 800 ma battery weighs 1.2 oz. 6.0v makes these baby's strong and quick.... rgds, jeff.....