I am obsessed with the appearance and operation of O scale and possibly all large scale locomotives.
I now own 3 Atlas O scale 2 rail diesels and WISH STRONGLY that Atlas would have built their diesels with axels extending into the side frames AND journals that move up and down using coiled springs. ALSO the axles on the GP60s should have roller bearings that actually turn like the prototype.
How this can be accomplished is by making the axles to taper at the ends and the roller bearing can be made of Delrin Plastic made to look like real Timken Bearings fitted on the axel ends. The roller bearings have to be plastic to prevent electric shorts in the truck side frames.
Right now the way Atlas locomotive trucks are made, there is a gap between the sideframes and the wheels. That gap disturbs me because it's visible on curves.
If Atlas would make their locomotive trucks as I suggest the modelers would be thrilled to death. At least I would be and the money we pay for these would be more worth it.