new set up - jumpy

They are cheap batteries. I have 4 sets of IB3800 but am waiting for the jig to come in. I have not movied the UBEC around. I will give that a try. I Initially had it int he back, then switched it with the receiver.

[Gustav]

It's probably the batteries not able to deliver the current if the steering isn't twitching aswell but if you have a reciever pack then that's the easiest way to rule out the ubec.I find it's worth experimenting with the position of the ubec in any case to get the most radio range.