I just spent the last how ever many minutes lookin at the posts,haven't checked out any of the blocks, as they don't really pertain to my field, but I can imagine the complexity. So, I have this vision... I've DB'd all of the valves, fittings, fixtures, etc... that we use at our mechanical/electrical/plumbing engineering firm. What I'd like to do is to create dynamic blocks for some of our piping/wiring schematics. Is this a realistic goal? I'm drawing a blank as to where to start...