This stuff would be beautiful to work with and the sizes available might work out, but you'd need to be willing to invest a bit.
The 8" x .250 is $70 per foot
http://www.eplastics.com/Plastic/Plexiglass-Cast-Acrylic-Tubing/Cast-Acrylic-Tubing-Cylinders-Size-Availability-List

Dale

Quote from: webby1 on July 25, 2012, 05:21:15 PM
Polycarbonate sheets have a forming temp of 275 F, so roll your own and put them in the oven to "set" the curve.

Good tip.  I've use the same method to curve plastic that was then to be cut into aircraft model canopies.  This should be a great way to make clear cylinders of thinner wall thickness which really improves the efficiency of a model.

What are you using for the end caps of the Pod/Risers?  The same thickness?  Same material?

M.

@webby1,

He he.  Well done and a tip of my hat to you sir.  Your resourcefulness is an inspiration.

So, one off topic question, purely for my own curiosity.  You are French Canadian, no?  Please do not respond or just PM me if that crosses any line.

So you are roughing up (sanding) the ends of the "tubes" so they adhere to the aluminum end caps with the RTV?

Also, I'm not sure what you mean by "ring wall spacers?"  Please help me to understand.

M.

@webby1,

Any chance for some pictures? 

M.

WOw - that looks good.
What is the metal for?
Wayne