I've made multiple attempts at sanding a wooden pole to properly fit the socket this spear head I got. And each time I've been met with complete failure. I've used a compass, found the center of the pole, marked out what the tip needs to be sanded to, marked where the bottom of the socket would be and masked it off. Yet no matter how hard I try, or how slow I go, my slopes and angles simply never match up. One side is always more rounded than the others, or steeper than the others, and the end result has always been an off-centered spear head that sits crooked at the end of the shaft, looking exceedingly sloppy. I have no tools for this beyond a 4-way wood rasp file, sand paper, and a ruler and compass. That's all I have to work with, and an apparent inability to properly recognize angles even when using a spirit level. If there's some secret, some special technique to sanding a round pole to get to an even, symmetrical point, I apparently don't know what it is.