its like this
first u use SAFC , then not enough u get SAFC2 ,
SAFC2 not enough u get E-Manage cos ignition oso u want play
then E-Manage still must use MAF , so u throw get Microtech Piggyback
where got enough haih u put Microtech , errrr then when time goes, aiyoo u want more tuning points lerr , Haltech lerr, aiseh now u want faster processor with even more tuning points errr so MOTEC redi hahahahahha