Thanks Pete.
We do use a lot of Picco switches on our club layout and that seems to be where the derailments happen. Will have to attend to that problem as well. Will also look to see if the truck is pointing in the right direction. So many things to think about!! LOL
Rick
Yes, Peco switches have flangeways which are deep and rather wide. IIRC, they are deeper than needed even for MTL pizza-cutter wheels.
While the Kato wheels look really good, they are not happy going over Peco switches. The low-flange narrow-tread wheels of the FEF-3 literally fall into the flangeways at the frog. I don't know if the other treads mention it, but one option is to make the flangeways shallower by gluing piece of evergreen strip styrene on the bottom of the flangeway.