I've been through the same process, so don't stress that your the only one. My first tune was through a company that dealt primary with Holdens, tune was terrible and I had massive issues with it. Find a tuner who's happy to help, communicate and knows what they're doing. You'll be much happier with the result. And don't just jump straight onto the next tuner that's the second mistake I made, im not sure about tunes in Sydney buy some of the guys on this forum are bound to have suggestions, ie CMS.