Yes I had a 9.5 went to a 12 and the heat is horrible, now i am looking for a mag 9 again. I measured my mag with a kilowatt and its pulling 175 watts not the 110 it is supposed to and this is with it wide open. With everything running through my apex I am using 3.2 amps, if i kill the mag 12 it drops to 1.4. WOW!