As a follow up, there was no one at the show, who came by my table, who admitted to being fans of the Graybeard Mortar/Cannon site. Anyhow, I did get to do quite a bit of visiting regarding BP stuff and some were quite interesting. Heard some real horror stories and was amazed that the shooters were still alive and able to tell their stories. Got a lead on a presentation cannon. Now if it just materializes! There you have it! Blaster (Bob in So. CO)