I aggree. In my situation, I have to draw quite a bit of refrigerant pipe (ACR) and medical gas (OXY MED) pipe. The OTB BRAZED COPPER pipe sizes are not complete and do not reflect all the sizes we use. It is good if you are just drawing hydronics and plumbing. At one time I had modified the catalog to include the most common sizes we use. Then iI had issues with my compuiter and had to do a clean uninstall/reinstall. Now i can't figure out how I did it.
