I'll actually be drilling my resin cast cylinders and I managed one with the eyeball method. But figured there had to be a better way to do eight more. I like the idea of making up some sort of drilling guide. The challenge is that the resin cylinders (with details) can't really be "clamped" under the drill press. On the first one I drilled a small guide hole, then a larger hole and a larger hole before finally using a Foster's bit while holding the cylinder in my hands (wrapped in a cloth). It wasn't an ideal operation.