Place one of the two discs marked on only one side flat on the ground with the support bracket
facing up. Mark this the bottom disc.
Place two half drums along the marked diameter line. The two tips A and B of each half-drum
must be exactly on the line, and the inner tip A of each must also touch the circumference of the
8" circle drawn on the disc.
While the half-drums are in this position drill 1/4" holes into the disc through each hole in the
drum brackets, inserting 1/4" bolts and nuts, and lock washers (underneath the bolt head and the
nut) as you go. Start with the outer tip B of a half-drum, go directly to the inner tip A, and then
drill the holes in between this will stabilize the half-drum for most of the drilling.