The carpet has a very thin pad, and it's not a pile carpet. I don't see this sinking to any degree, but I've considered some pads under the legs, just haven't come up with anything yet. Several suggestions have been floated.
For all my storage under the layout (as you can see, it's very open under there), I plan on using carpet glides on some custom storage sleds that slide out.
I'm working on the track plan, still thinking about what I want to do, but I want to finalize something soon.
I'm not sure I'm ready to do the cookie cutter roadbed, I'm leaning toward simple here.