Gene Maag, I've never heard of Precision Board before seeing your post. A quick search reveals it is a high density urethane material in different densities. How do you work with this material? Where do you get it? I saw one reference for a 12" x 12" x 2" for $75. That seems a bit pricey to me, but perhaps that is an industrial grade material while for our O gauge needs a lower quality (and cost) material is available. Please tell us more!
Dale