@ Patrick - Thanks for your question. I have a 1 yr old Greek Black grown from a cutting that has, in effect, 'bifurcated' from the main stem at a very low level. I'll post a pic later so you can see what I mean.
Anyway, the result is an unsightly-looking plant. The usual solution to this would be to simply remove the smaller of the 2 shoots, and either use it for cuttings, or simply discard. But why not air-layer it instead? So ok, this is not my usual or preferred size for a layer, but since I've already got a home for this one (actually, a forum member), there's no reason I know of why this cannot be done on 'rogue' shoots on even small trees. But if you want to know when I usually do my main 'giant' layers, see my #44 post above.
So that now leaves me with a potted tree that has a single shoot growing at roughly 45 degrees - still unsightly. How am I gonna solve that 'problem'? Well, I could layer that as well, then re-pot straight, but why not simply put it in the ground with the root ball at an angle so that the shoot itself points straight up towards the sky instead of sideways? Problem solved.
@ Aaron - Thanks for your continued interest 'bro'. Watch this space.