http://www.leevalley.com/garden/page.aspx?c=2&p=10254&cat=2,42706,40719

Brilliant! That's got to be one of the coolest things ever.

I seen those a few years back I wonder how well they work

seems like there would be better positioning but less touching of layers. anyone try it?

The pictures are quite misleading. The plugger is shown being drilled to an oblique angle with respect to the tree trunk, but the only way the scion is sharpened is perpendicular angle. If you are attentive to geometry class and know about conic sections, this kind of orientation will never have a matching intersection where the cambiums are supposed to come into contact. What is needed here is a sharpener that can also sharpen at an oblique angle. That setup will work if you can be content with a perpendicular hole, and should work very well with apples and pears. I don't think that approach will work very well with citruses.

i was thinking along those lines...
thanks for the reality check