HL Pershings, among other models, are half-axe assembled by young kids with minimal training. In many cases, road wheels, idlers and sprockets will become unglued and have to be re-tacked back together. I have never had a stock track problem and the Pershing has about the best tracks as far as dependabilty, strength and traction. I think your track problem is probably due to the idler not being glued on and alligned with the track. Check the engle and how it alligns with the center guides as opposed to the road wheels.
Can't help with electrponics....James has offered a suggestion and maybe Blitz will respond.