Drum support structure

Okay, here we are in April 2007. I was working on other projects at the same time, so this is about 6 months after I started. Significant progress has been made: I know that I need a plexiglas drum to float vertically in front of me when I am sitting on the bike, with its center lined up to the height of my eyes. The drum will be 4' wide and 1' think. I acquired a pair of 'pillow block' bearings to hold a machine shaft, which will pass through the center of the drum. It gets mounted to a drum support structure, made out of the same 2" mild steel square tube that the rest is made from.

The silver cylinder pictured is a hollow aluminum tube that I bought and asked the metal tech to TIG weld two flush caps to the ends. I envision the drum struts to be made from aluminum rod (pictured), on which I start the process of tapping threads on to the ends in order for it to screw into the tube. I later abandon this in favour of threaded steel rod. I also have a lens/mirror from an overhead projector (pictured), which may be incorporated into the viewing apparatus.