So I've had my racechip for about 3 months now and I'm thinking about trying out other chip/piggy back. I would like to know the difference between lap3/jb4/racechip? I notice jb4 uses 2 connectors and Rc has 3. Also heres Tork but I really dont want to mess with the ECU. Anyone who went from 1 chip to the other notice any significant difference?