> Primarily I'm a power-tool user but with my biggest tools in storage I've
> been doing more small projects with hand tools and it's a different sort
> of fun. I've also been spending a lot of time watching Roy Underhill and
> The Woodwright shop. A lot of joinery work seems much easier using scribes
> to mark locations then a pencil and it's a wonderfully simple tool so I
> want to make one for myself but I'm curious how medieval versions held the
> marking tip before metal screws came into common usage and if there are
> better cutters then sharpened nails.
> This design just wedges the nail in place.
> In an ideal world I would think a piece of snap-off disposible razor knife
> would make a perfect tip but I can't think of how to anchor it without
> modern equipment.
Think wedges. Either the wedging of the cutter directly into the wood
(such as a nail you then sharpen) or a separate wedge such as holds a
plane iron. No screws required