What i want to know, is the circuit (it hasn't arrived yet, bought it for $23 with a blown esc ) the same as the Amp besides the rear shock tower and tyres? And are the upgrades the same as the Amp? If not, name the best upgrades. Keeping in mind I am building it for my Autistic son. I am thinking !5t Brushed motor, for now, with the Amp Rx/esc out of my other sons Amp that we upgraded to brushless. Fast servo for steering and stock the rest Your thoughts?