It sounds like the Kakimoto is a good choice then, only thing is though, I have had a look on Nengun but I cant find the N1+S or the Kakimoto race ? I can only find the Jasma approved system which is no good for me !! These are what I have found:
Kakimoto Racing - Full Mega N1 - Nengun Performance
Kakimoto Racing - Regu 06 & R - Nengun Performance
Are there any other places I could get the system and a good price from ??