Thing is your delving into territory which the superchips rep will be doing, it's not necessary to even touch your ecu yourself, speak to superchips and get a number of the local superchips specialist. They will remove the chip and put in a piggyback chip holder and then new chip in. If you've been meddling yourself they may not want anything to do with the job, as that's what they specialise in, it's all part of the service so to speak. You don't get a chip in the post, the superchips rep does all the work.
If you speak with your rep, as I did and mention what mods you have or intend to do, they can alter the chips perimeters say a little even more.
Ideally you fit your 3.0 mods and cams first, then chip it.
Like I said before, the car feels smoother, but didn't rip my wig off on the way home! But I was happy to pay the money.
If your prepared to travel, speak to Richard Davies 07971 655701. Or email
sales@wiltshire.superchips.co.uk
Or ring superchips themselves who might help you with a local guy to you, but I can vouch for rich, he did it on his driveway in the back of his van, this saved me some money as he didn't come to me.
Rich is one of the remaining long term/established reps who cut his teeth in the more fluid tuning market of the Ford RS fraternity, he worked alongside Ford in Swindon remapping and chipping the various RS's around of the 80's and 90's.
All I can say, is speak to rich and hold your horses!
Cheers Dean