I see that gearing down will help acceleration and the Sirio to get into it's powerband, but will top speed suffer on large tracks? Mine is a dog right now, not real happy since my OS CZ-Z out performs it so far. Runnning a legal .12 in an R40 with stock gearing, RD Logics one piece legal, and NR C6 plug, on O'donnell 20%. Getting my @_$ fed to me currently.