My speedo went after 2 battery's, the steering servo seems to be a problem for most so that got took out, the steering horn went after about 10 mins, i also removed the servos for locking diffs as i just wanted a good reliable truck. Hobbywing 1080 is a super esc for about £40, you can use tie wraps etc to lock diffs or about £30 to fully lock them with the traxxas parts / spools? alloy servo horn about £5-10. I run mine on 3s for good run times and mostly just the slower gear, i have the outback which was great for the money and also the carrisma is good too but they do get tied up / caught in twigs etc where the trx just plows through most