Quick question which may have been covered before but I coudn't find anything specific to my situation.
I have trident maple with a double crown branch which is become a bit crowded. I am going to take one of the branches off to thin it out a bit. I'm planning to use the branch for a shohin project (hopefully you will see it in that section

I have a fairly confined area to work in as the crown is fairly dense. The cutting will be about 8mm in diameter and about 80mm high with 3-4 little branches off it. Ideally I would like to airlayer it but wasnt sure if I have enough room. So the questions are.
1) If I do airlayer it, what is the best time to do it. Buds are about 1 week off swelling. Should I do it now or wait till the leaves harden off?
2) If i cant airlayer and need to take a cutting should I also do it now or wait till the first leaves harden off?
Left this a bit late as the tree is almost about to shoot. Any advice would be appreciated
This is the only photo of the tree Autumn 2011.
Cheers