hi guys,
this is my first post, so bear with me
. anyway,the railroad im modeling had a roadbed that followed the contour of the land, nowhere along the 72 mile run of the line was there a raised bed. my question, what is the best material to use as a foundation for my set? im going to use code 100 flex track, there will be a few creek crossings, but nothing major, build it on straight plywood, or add some sort of foam?
thanks
kevin
this is my first post, so bear with me

thanks
kevin