THanks for the wise words Wayne, tinkering is all very well but there are risks you're right. I think I'll start by taking the beast to a nearby dyno tuner and see what he makes of it as it is first. With Tune ECU and the 20355 map installed, derestricted and TORs, might as well make sure it's working to it's best possible performance before I start anything else.
I did a track day at with it last year which was interesting, especially for the spectators,but that's not what it's meant for of course - but I do like to push the boundaries a bit....