Step 4: All Your Base are Now Belong to Us
Turn the base ring up on it's side and make two marks about sixteen inches apart 10" down from what used to be the middle of the barrel and cut along these lines. Set the barrel up, ringside down.
We are now ready to fit the base to the top of the chair. Rather than employing an abacus and arcane mathematical knowledge, the easiest way to achieve this is by sitting the top of the chair on the base and fitting the top of the base into the ring on the underside of the chair top. Once you have a nice fit, drill a couple more 9/64" holes and secure the base's shape with nuts, washers and bolts.
At this point we broke out the torch again and applied heat to the new seam. First, the heat allows the seams to "relax" into a more natural shape, that is visually appealing and appears more "finished". Secondly, we like to play with fire and tools that roar.