nock overlays - how ?

[luxhunter]

Hello fellas, I've seen so many beautiful nock overlays, be it horn, antler or a contrastingly coloured wood - how do you do it, so you don't have to sand down the outer ring of the bow and weaken the limb by doing so ? and how can I get them done niceley without sanding down to get a neat tranisition from limbwood to overlay ?

[TexMex]

take a look at this.
 http://groups.msn.com/ferretsarcherywebpage/installingtipoverlays.msnw