Ok next step: deciding on what battery. It will be a Zippy, 5s or 6s is the question. 4s is also an option. Which will the setup run coolest on? Will my tranny handle 6s fine? The higher 's' i go, the less mah i will be able to afford... I'd like a really high mah 4s. Think that'd be fun. It seems like they still perform great. standstill backflips, and plenty of top end for a big truck like the Savage. Your thoughts on battery voltage?