Darkfire,

Generally, from my experience, it's recommended that you break in the engine with the fuel you intend to run. Though some companies market a break in fuel, it really isn't necessary.

If you want to run 30%, just start with 30% and run it from there. Though the fuel blend CEN recommends is 20%, you can run 30% safely in the stock .46 and 7.7 engines.


Matt,

any standard 5 cell (hump pack configuration) will fit, but it you're asking about a 6 cell (7.2volt) I would not recommend it. Some servos can take the increased voltage, (alot of hitecs are, esp the ones meant for robot wars/battlebots use, but most rc car duty servos, you could ruin the pots in the servo. In addition, depending on if the voltage regulator in the receiver, some can handle the extra voltage, some won't. As far as I know, the Skyion RX is not meant to handle over a 5 cell RX pack.

For servos, in my Nemesis I have a Hitec 5955TG and it came a nice looking blue anodized servo horn(over 300 oz of torque!). In my GST I have one of the ACE DS1015. The Ace is a beefy looking servo, but it comes with a crappy servo arm that strips out all the time. Had to replace that arm with a aluminum servo arm from Racer's Edge.

For throttle, I still use the stock servos on both trucks.