These brackets will attach the plywood disc/half-drum assembly to a pipe shaft.
Make sure each bracket slides over a chosen, straight 1 1/4" (nominal that is, will not be exact)
diameter pipe at least 8' long.(Lead pipe out of question--too heavy and too soft.)
INSTALL THE DISC SUPPORT BRACKETS
Center a disc support bracket on the marked side of one of the wood discs.Trace its outside edge
onto the disc.