Incredible, I guess he has all the business his lhs can handle. What an attitude. Sounds like my experience when I bought a Tmaxx here. Obviously you touched a nerve when you relied online. His loss, not yours. The local shop I chose to deal with was because he was more than willing to work/help with something that didn't come from his shop. He caught a lot of my business for just that reason

Somethings changed to be causing these probs. I looked at the truck - looks well made, not a cheap rtr that breaks on the 1st run. Since the prob stayed when you swapped servo and you're having it with the other channel as well (strg), I'd focus on receiver, check that servo plugs are seated. Make sure where wires go is clean and has no dirt or anything that can short between terminals.

Open the radio box and find crystal, push down on it to make sure its seated. If its easy to reach and get hold of, pull it out and then re-seat it - has 2 wires that fit into socket like places in body of the rx.

When you talked with xtreme, what was there advice, what are they sending for parts to help?