do any of you guys have this? or do you all have the the mafr pro? it seems like a nice piggyback. i'm wondering because everything i seach that has maft in it seems to be about the maft pro. it looks better then the apex when comparing its functions. for the those that do have one what all did you have to get to go along with it? can it work with the stock maf sensor? i just want to adjust the fuel.