Sorry to hear your truck is still giving you grief.
Mine is heading to yet another shop to try an figure out why it continually drains the main battery if left undriven for more than 4 days. Never again! Once this is resolved, I'll only use my local Toy Specialty shop/fabricator (Trail Tailor) for any modifications I can't handle myself. If not resolved...have to decide if its time to sell.
For the kind of money spent on the initial purchase and extensive modifications ES is selling (at a substantial profit), these trucks should have ZERO issues....short of user inflicted trail damage.
Start a thread and tell us about your setup. We can help.