We've been running minis with Lipos (Orion 3200s) for nearly 2 years now. And until the TCS season came along we only ran 2 oz. of lead on the underside (wings) of the battery. I believe the cars are around 1240-1250 grams and handle superb. So don't let anybody tell you the car has to weigh as much as a NIMH car to handle well and not flip....a little tip...CA is your friend.