Just to give an idea of how well the FX runs stocks...
Jimmy Maddison used the FX to win all 3 legs in 19t at the DHI cup 08.
Snow birds 08:
12th scale 27T stock
A Main
Jeff Cuffs qualified 4th finished 1st FX Pro
Mark Smyka qualified 6th finished 7th FX Pro
MO Denton qualified 8th finished 10th FX Pro
Touring Foam 27T
A-Main
Jeff Cuffs qualified 4th finished 2nd FX Pro
Mo Denton qualified 6th finished 4th
Touring 19T Foam
Jeff Cuffs qualified 7th finished 4th
Cleveland Indoor championships, 12th scale stock
1st Mark Smyka
2nd Jeff Cuffs
5th Jim Herrman
9th Wayne Gerber
Just a quick snippet of what the FX has been doing, and theres much, much more.
Its a very capable esc. I do believe there will be more adjustability to follow (accessible via hotwire) but at the moment, as you can see, its holding up great, and so will your comm

I doubt you'd be disappointed.