None of the tuners will carry building on a tune, from what I remember you need the original ROM file created by them to be able to modify parameters and re-upload in your ECU. They all start from fresh / base map, unless you're going back to Jez which has your ROM file. Why don't you go back to Horsham?
Thanks for your suggestions guys, all noted, will update the first post and start looking into it.
Keep it coming
Rob, they will be the same with the 370z bolts, custom TORQEN design, allen key style.
Add something more and you get a full setup £2599 for TORQEN L.
Let me know if you want a custom size or just the fronts for now. Remember, 2 years warranty on calipers
http://www.350z-uk.com/topic/96357-torqen-370z-and-350z-torqen-big-brake-kits/