Im not too sure on this but at a guess I think the gotech unit has in internal map sensor where the omex would need an external one, also the gotech runs both low and high impedence injectors so you will have to check that your injectors are compatible with the omex. Get in touch with Jamie at jamsport or simon at sitech about your existing gotech. I find it hard to believe that a competant mapper/tuner cannot get to grips with the gotech interface.

Hope this helps matey