I'm not sure what all factors played into our decision to take the 4.5 systems out of distr. Once 1:8 racing began, it was obvious that the 4.5 systems were the most problematical (and the most popular...)
Racers who know how to set up their equipment for 4S usage have gotten many years of use out of these products; however, guys that don't take the time to set-up/use it properly create the most criticism and complaints. Telling customers that they are "boneheads" isn't an option....
So, in re-launching the HV 550 for 2S short course (4x4), we only emphasize this new use. If any of you have been following the ROAR thread on RCTech (Off-Road), you can read just how Novak is getting the cr@p beat out of us for even offering this 550 for the 4x4 trucks---ROAR has ruled that only 540 motors are legal.