WOW, what a difference!
Soooo much smooter now, no spluttering at all and revs smoothly up to 8k where it hits the powerband and goes like Linford Christie on crack! LOVE IT!
Might need a bit of fine tuning as I want that 4.45 reading on WOT but for now I'm happy as can be, two months of mind bending tweaking, just need to get the RC valves working now (they may even work now the TPS is setup).
Thank you all for your help, I'm gonna tear round Dubai for a few hours