I am just getting stared with my layout after years of inactivity. Reading about the various ways of building mountains I think I will go with the stack foam. My plan is to have three different access points going into the tunnel and one road bed going on the outside half way up the mountain. I am thinking it would make since to make that road bed out of wood for durability and then build the foam around that. Would that be the preferred way to go? For those that are using wood for elevations etc. are you using 1/2 inch either plywood or MSB plywood or some other substrate. Thank you.
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