This is my first lathe with indexing so I spent a while trying to figure out a way to drill accurate straight holes in the bowl. I was going to try to somehow fix my drill to my bowl steady frame but gave up on that idea. I decided to start with a piece of Cherry and turn the bottom to 1 " diameter. Since the plug cutter I was going to use cuts 3/8" plugs I needed something to steady the 3/8" drill bit. I found some 1/2" pipe at Home Depot and, lucky for me, the inside diameter was 3/8". I drilled a 1/2" hole in the jig and glued a piece of pipe into it. Now I had a guide for the drill bit and wouldn't wear away the sides of hole in the wood with repeated uses. So now I can use the banjo to hold the jig and set it in position either around the edge of the bowl or on the face of it and get perfect alignment every time. (sorry about photo 2... it didn't want to rotate for me)
[photo 2 rotated]
rotated_r74z9okv.jpg