This build involved cutting and welding steel. If you attempt to do this you should work with (or be) a trained professional and always wear proper safety equipment.
MATERIALS AND TOOLS:
-MIG welder (Millermatic 211)
-threaded tee nuts
-3" neoprene casters (medical grade)
-G1S 3/4" plywood
-industrial strength double-sided tape
-kneeling pad foam
Step 1: Casters and Plywood
I also got some interesting feedback from a great guy at Majestic Casters. He had worked on a number of theatre and stage productions and supplied casters for shows like Phantom of the Opera. He advised me to use 'medical grade 3" neoprene casters'. They are a bit expensive (at $25/each) but they have a metal guard on them to help keep hair and other debris out, they turn with a double ball bearing system and the neoprene is soft enough that it can run over small objects without screeching to a halt.
Step 2: Add a Comfort Fairing and Eye Hooks
Step 3: Paint and Finish It!
Finally, I cut the kneeling foam to spec on the table saw and mounted it using 3M outdoor mounting tape.
Step 4: Put on a Puppet Show!! You Be Done!