Hello Michael. I have seen the segmented hoops and they really do look quite spectacular. My first thought was to use an ROS as you do, but the amount of wood to be removed I think would be too much. Better to use some sort of cutting system...e.g. router.I have made several segmented drum hoops of all sizes. I use 40 or 60 grit sanding discs on an angle grinder, then ROS for the finish sanding.
I forgot to mention in my last post that I do not yet own a lathe, had to sell my last one when I moved away from Ruxton Island. However, it looks like I might be picking one up tomorrow.
Only has a 12" swing, but I will see what I can do about raising that with some metal blocks. Even if I only used it to turn the drum by hand, that would be OK. I should be able to rig up the guide rails in conjunction with the lathe. I think it is 42" between centres, and the drum is 30" tall, so there should be room.