There are other options to Cossie management mate.

I was determined to get Cossie management on mine but was talked into a 5th injector. And I can say I'm glad I was as the results were impressive.

Have achat to a few people and look at all your options before jumping into anything. Gadget seems highly rated and seeing the workmanship on a couple of his cars I really can't fault him or his conversions in any way