The MTH G scale engines come with two sets of pilots. The handrails stay short and the couplers are truck mounted. I have contemplated moving the couplers to make them body mount. I do this with most G scale cars to get their couplers at the right (same) height. I have not had a problem with them yet where their mounted. The handrails I've never touched.
I've got to add the snowplow and hoses. It's nice to have fixed pilots with just turning two screws. I'm happy with the level of detail of these. Probably too rough for some?