04-04-2015, 02:46 PM
One of the advantages of using the Athearn truck is the robust gearing and the fact that it will accept many different styles of plastic sideframes - those on the BEE are meant for C-Liners and are from Detail Associates. The Athearn truck is also a lot less expensive than the NWSL truck, and is usually available, used, with a complete locomotive. That means that you get a compatible frame on which to mount it , along with, possibly, a useable motor and drivetrain, plus a body shell from which detail parts can be cut. 
Wayne
Wayne