FWIW, I just got through using the 35c 5500mAh 3S packs in a race this weekend.
Sorry to say, but I'm a little disappointed. Used the pack in my X1-CRT, 11t pinion, 62t spur...and the punch I was expecting was not there.
In the truggy Main, I switched back to my NeuEnergy 25c 5000mAh 3S, and the difference was noticeable, but not major. I think I may try out the new Enerland 43c packs...
don't know if this helps any.