I think im going to go for a greddy ultimate and get it mapped in the near future, but i dont have a clue where i would take my gt? im from cumbria so theres no where around me that i know of. at the moment im using an apexi safc running 210bhp or just over at 14psi. So i need the greddy ultimate unit then i need to buy the ignicton and injector harnesses separetly right? or is there other things that i would need?