For me, most of the fun is in the planning and research. I sketched out some ideas that could be very easily built using simple 2 x 4 lumber. I then went to the local Home Depot and Lowes to see what was available in the plumbing department that would provide the right scale. Once I had all the sizes determined, I started modeling a solution. I'm an Industrial Designer (www.eikedesign.com
) so I used Solidworks to determine the plumbing method. I decided to plumb a path from the fog machine exit up thru the bottom of the cannon to exit out the front. I used a large diameter pipe for the cannon body, a smaller diameter for the fog path, and a reducer on the front of the cannon to mate the 2 and to simulate the thick wall of my cannon.