hmm. don´t think you realy need the mod Ulrich Röhr did to the Jazz55..
imagine: he flies the Jazz55 in his Factor (heli with 1.8m rotordiameger)
with 10s2p Kokam3200 !! (so 6400mAh)
with peaks up to 110A
(so over 3000Watt Power, look here for onboard-diagramm:
http://www.ulrich-roehr.de/hubi/e-power18/factor2b.gif)
that are reagions you will not (and want not) reach in a 1:8 buggy
count with around 1000Watt-1200Watt peak max on track
and not more than 2000Watt for speed-runs..
i think you will stay with peaks under the continouse-amp-rating of the JAZZ55 (=55A)
(someone here has an 1:8er with 5s Lipo and 120A peaks running 65mph.. and when you watch the video: thats too fast :D seriously ;) )
oh:
10s 2100mah-Batts..
considering you have 30C peaks
--> that are 60A max (you don´t want more for batterie-life-reasons)