Hi guys i am asking this on behalf of a mate who has a DHK Optimus XL..the thing is the steering servo is what id call slow to say the least...so he is looking to upgrade the servo but when we read about servo they seem to range from 4.8-7.2volts..the thing is the Optimus XL runs on 2 x 7.4v one for the motor one for the servo..so will a 7.2v servo get fried running a 7.4v lipo through it. Also we are both newbies and i know nothing about BL he was also wondering if anyone knows if the motor in a Optimus XL straight out the box could take a larger volt lipo than a 7.4V. Cheers guys