I just finished making this yesterday to finish som end grain hollowing I was doing.
I didn't have enough reach with any of my other tools, so I came up with this. The tool is just under 30" overall, the handle is 18" and about 1 3/4" diameter oak. The shaft is some 1/2" dia stainless tube I had, and is 16" long, 6 inches are buried in the handle. The cutters are 1/4" square HSS I had, held in with 2 set screws. I have a couple of different profiles. So far I've gone about 9" over the rest and its still manageable. I drilled out the end of the handle and added about 1/2 lb of steel shot to add some heft. Best part is, .78 for the copper fitting and 3.00 for the shot!
Happy Turning!