Wonderful photos, thank you for posting them!
A long time ago on Gardenweb, there was talk about grafting and I gave it a try but it failed. If I remember correctly, there was a discussion about what time of year to remove the buds from the scion, because the bark and bud would slip right off but only at a certain time of year. It's been so long I don't remember the details, but I remember the bark and bud did indeed slip right off, and I made the T-shaped cut into the branch and slipped in the bud, and taped it with electrical tape. HOWEVER, I did not prune off the end of the branch as shown. Maybe that's why my grafts didn't work? Also, the scion wood was a bit smaller than what the man in the photo is using, and the branch I grafted onto was not nearly that big.
Spring is almost here and I may have to try it again. How exciting!