Me and electric's do not go so I have run into a slight problem I have an Astrocraft shuttle unit which I am using with a Gaugemaster unit the shuttle unit has two wire's to go to the track no problems there and the other two wire's which are marked power go to the controller. There are 6 places on the back of the controller 2 for track 2 for aceessiores and 2 other's (I HAVE TRIED THE WIRE'S INTO THE DIFFERENT PAIR'S OF HOLE'S BUT IT WAS ONLY IN THE HOLE'S MARKED ACCERIORE'S THAT A LOCO WOULD RUN)The train run's back and forward's ok just as it should. the trouble I am having is that the loco goes only at one speed that is fast or more like very fast, when the controller is wired up to the track as is normal ie without a shuttle unit there is no problem. Short of making the train so heavy so as to make it go at a reasonably speed I am at a bit of a loss, HELP PLEASE THANKYOU