Just finished converting mine to efi, running an omex 600 ecu. As said above about the cossie management, nothin wrong with it and there's alot of tuners out there who get great results! BUT for me, the cost and availability of new parts made me go down the standalone ecu route. I went for omex purely cos it seemed reasonably proced and i had someone who could supply and map it for me. Cost a fair bit more than i thought it would after all the silly little things i had to do and was more involved than i realised, was all worth it tho! From what i can gather, gotech seems to be a much cheaper option but i'm happy with the results from mine.