I have a go tech 5 port for sell. It will need a piston and sleeve. I've had it about a year. I have had trouble locally getting parts. I am getting an engine that is locally supported. ordering parts and waiting on shipments takes too long. If you want to buy call me 678-230-4679. I will take paypal and checks. I will take trades, for hitec servos. I live in Stockbridge, GA