Hi I've just fitted a DH126MT chip to my new Bachmann class 66 which ran great on DC, however after fitting the chip I was unable to control the locos speed as luck would have it, it was still on the running road or it would have landed on the floor. The loco is set at 128 speed step I've tried changing cv 2 and momentum cv's 3&4 but nothing works. The loco is running very smooth...just over speed. Any help and advice would be very welcome before sadly sending the chip back