I just wanted to share how I sand the nodes of my tonkin shafts. Sorry no pics right now, but I can probably post some later if need be.
I took a couple of plastic lids from some 1 gallon ice cream containers and cut the rims off to make them even more flexible. I drilled a 1/4" hole in the center of them after applying self ahesive 80 grit sanding discs to them. I bolted them together (bolt head, washer, disc, washer, disc, washer, nut) with the sanding surfaces facing together and chucked them up in a drill press. Now you take your freshly starightened arrow shaft and chuck it up in a cordless drill. (Not too tight!) Turn on the drill press and start spinning the arrow shaft with your cordless drill and force it between the two discs. It will go in rather easily. It takes a little practice, but you catch on quick. Wear a glove on your free hand to support the other end of the shaft while you work. You will have to seal the shaft now anyway, so I finish up the shaft by using a thin, fine grit sanding pad on the shaft while I spin it with the drill.