Hey Bach-Man

All my rolling stock is converted to knuckle couplers either accumate or MT. Got a Bachmann SD45 for my birthday. I tried use MT 1015-1 couplers as MT's website says is the one that should work. Works fine on the front, but on the long hood end there's not enough clearance between the coupler MT coupler box, and the truck causing the truck to bind. I've ground down the coupler box and rounded the corners and it still binds. Any suggestions, only one I got was on the Trainboard. " Buy Katos".

1. Why did they not put flywheels on the GP DCC equipped series and on the SD40-2? If a couple of each. They run fairly smooth, flywheels would be a great improvement.
2. Why isn't there BN GP's and a Spectrum Ultra BN SD45? I model post merger BN. I purchased two Undec SD45 ultra's, and found some older Spectrum BN SD45 shells. After some shell work the older BN shells fit well enough. No cab figures, lighting is fair, after using some parts from the Ultra shells.
3. My DCC SD40-2, no matter what start voltage I use takes forever to get moving. Any suggestions?