nothing so extravagent as yours Stu, well not yet due to constraints of cash (thank you HM Treasury for your persistence... )
Im going for a Roller Bearing turbo with high flow 48.29mm inducer compressor wheel, re-profiled compressor housing, Low inertia GT28 series turbine wheel and shaft, 0.64 A/R turbine housing. Staggered gap/ total seal turbine end piston ring fitted This will give better throttle response and the turbo will spin up about 1000 rpm lower. It handle more boost, up to 35 PSI apparently ( future proofing) although initially im going to run way less than 1 bar to start
This with modified management and some engine end exhaust mods and and a serious look at the brakes at effective as they are ive boiled the old dot 4 and so its time for some 5.1 or silicone and EBC Greenstuff pads