I expect someone has done this before, but maybe not documented it.
I'd been wanting to try it for ages, I'm doing a longbow and there are a fair few nots to plug.
An ordinary plug looks a bit obvious with straight grain going across it, so I used a small branch of Yew to make a plug from the heart wood with it's natural circular grain. The plug looks just like the original not, but it is clean and solid, where the original had a black powdery layer all round it, so it wasn't solid with the parent wood.
I cleaned up the area around it to show it off... the bow is still a long way from finished.
The pic shows the plug and the small branch it was filed from.
Sorry if this is already well known trick
![Embarrassed :-[](http://www.primitivearcher.com/smf/Smileys/default/embarrassed.gif)
The knot goes in towards the sapwood an makes it bulge, but had almost grown over leaving just a tiny hole showing. I cleaned out the hole to sound wood and loaded it with yew dust/epoxy mix, so that when I pushed in the plug it filled any voids and oozed out of the small hole in the sapwood.
Del