I am back to 1905, the time frame fits the Bachmann 2-8-0's, which I really like. When I got the 4-4-0 with those "hinky" drivers, I was thinking about selling it. It really doesn't look like a typical NG 4-4-0 and doesn't match the Bachmann rolling stock. I always felt the prototype was the worse looking 4-4-0 ever made. Fortunately it had axle slots that could be increased easily to 1/8" for larger drivers. I really like the 4-4-0 with larger drivers, it fits the 1905 era very well and looks great in front of the Bachmann passenger cars.
The Bachmann Mogul drivers will fit with only a gear change and grinding clearance on the motor mount and frame. I put a suggestion that Bachmann should build a large driver version with the mogul drivers on the Bachmann Forum, but that has been ignored.
Harold