Sorry, very busy. Was teasing young Yen just a bit.
Boon learned a technique from Mr. Kamiya that is an approach graft that involves adding a double set of cuts and resultant flaps that are locked into complimentary flaps on the trunk/branch/root. For roots, the flaps are reversed to facillitate the transport mechanisms of the plant. Sounds vague, sorry. To do this you need sharp grafting chisels, 2, a sharp grafting knife, brads, grafting tape and grafting wax. This is a real extension of the approach graft and utilizes rooted cuttings, or seedlings, with trunks of about 1/4-1/2" in diameter. These new roots have the advantage of being more vigorous than the native roots. Make sense?
Jeremiah, Boon can teach you.