There was once a discussion "Kadee vs. Plano" in which it was
Manfred, the Plano parts are .010" or .87" HO scale. A prototype
APEX running board is 1.00" thick. If you can see a 1/8" HO scale
difference then you've got much better eyesight than me! I think
the Kadee, like all plastic running boards, are too thick.
Open grid tank cars runways, on the other hand, are 2" thick. It
would be nice to have etched metal parts for those.