yea i've actually spoken to Aim about it in the past they even sent me a wiring diagram+instructions on the wiring for me gen2 biike when i fitted my mxl2,it's a reccomendation as some of the parameters on the dash you lose,not really an issue regarding a track bike,but could be on a road bike,deffo harder on the gen3,as for gen 4 suspect same until (if) they release aP+P set up,which i doubt they will tbh.