I eventually went for the tuning box option after speaking with Andrew at DTUK.
I spoke to Andrew at 3pm and the tuning box was with me next morning before midday. Fast before being fitted to the car!
Looked at the instructions and decided to fit on Friday afternoon. Very straight forward fit, just had to confirm the camshaft sensor location with Andrew. Molegrips were required and ideally small hands but all fitted and car running within 30mins. Not bad as I'm not mechanically minded.
I think Andrew had set mine up on program 2, same as Ross', all I know is that put ya foot down and it's a HUGE grin factor. I love it, overtaking is now a breeze.
Only thing I wish, should have got in November when I collected the car.
Big thanks to Andrew at TDUK.