Having no idea what a pistix is, I guess the answer is no. One other thing I did was to cut the skeg off the bottom of the strut with a pair of sidecutters, then filed & sanded it flush. Less drag & better cornering is the result.

EDIT, I just googled pistix & no i didn't need one. My M11 transmiter has a dead band function & arc function that I used to dial out the negative input.

Cheers
Jason.