Danners im in the process of doing the same thing, my dad is modifying his own turbo high flowing it etc. Iv got a CT26 on my 7mgte and just want to buy the Garret TO4E compressor wheel and get the shaft balanced etc professional but Ive talk to a few people and they dont want to sell me the parts on there own or do the balancing so let me know how you go and ill do the same for you. Cheers