I've planned the sidings using ME code 40 flex and mainline with ME 55.
testing several steams that's are the bad news (or the half empy bottle?):
- ConCor GS4 = OK
- Kato GS4 = NO (jumping a little over spikes)
- Kato NW2 diesel and PA1 = OK
- Model Power (ALL STEAM: Pacifics, Mikado, Moguls...