I think it's sorted now, my batteries are 3000ni-mh and they are about 1 year old.
I just plugged a 3s lipo in, not charged because I don't have the charger yet but lipo cut off was set.
It was nuts,lol, backflip on first go, wheelie on half throttle, after feeding the power in a bit more gently this time.
Just need to wait for my charger.
The sand rover was also lifting it's wheels on the 2s lipo, so I think some new batteries were well overdue.
Glad its sorted buddie . I think you'll find 2s more that 'entertaining ' in the Blitzer lol.A good mod is to get a Buggy Champ front bumper and cut it about so it bolts to the skid plate on the underside of the Blitzer gearbox . Cut a lenght of 3mm threaded rod to length so you have two 'studs' either side of the rear most gearbox through hole . then add two ball ends . using a couple of snap on ball connectors add two lenghts of 3mm rod . Drill two holes in the champ bumper where these meet the bumper and pass the rod through . Use a couple of nylock nuts to fix them in place . The bumper now works as a anti flip/ wheelie bar . Works well and its very strong .