I even lay an extra bead on all outside seams, where necessary since the colors match so well.
You can slip the column-tube over you an reach up with glue gun to lay bead from inside. Just got to be tall for the 8 footers...LOL.
I recommend 3/4" plywood bases painted black with caster wheels. This adds structural support and the wheels make for quick scene changes. But you know this already.
"Break a leg" with Willy Wonka. We will be using them for the "Hobbitt" play.