Free-Mo Modules from HCDs? This thread has really generated a lot of ideas! I started it off asking for opinions about various ways of beating the variable temperature/humidity situation I experience here in the "middle Midwest" (where I've only lived for 3-1/2 years) and look where it has gotten! Please keep up the superb contributions! I have been selling off some of my "surplus" equipment (a lot of it still in its original boxes!) to raise money to replace the warping hardboard I had used previously in the around-the-walls sections of my new layout in favor of hollow-core door modules/dominoes. Now I'm looking at the reconstruction of these sections of the layout from a Free-Mo perspective and wondering: is there anything in the Free-Mo standards that would discourage me from building Free-Mo modules using HCDs?