I've been watching Larry Williams' DVD on sharpening moulding plane irons. Terrific info and I'd like to put his suggestions to use with my collection of hollows and rounds. He uses a flex shaft grinder in his methods with a few abrasive bits and I'm wondering where to source them. Any good suggestions for a grinder with a 1/4" collet? I'm also wondering where to source the conical abrasive attachments he demonstrates; he describes one as a "rubberized abrasive" bit which I can't seem to find anywhere.
Any help appreciated, as always. (And I just realized that this might be a power tool suggestion - but the end result will be sharp Neander tools).