This is a tree I misidentified as American Elm. It is actually Siberian elm. It was originally styled with pointed jins on top, in kind of a twin trunk pine tree style. The friend who gave it to me collected it from the side of a highway cut, hence the growing angle. I decided to hollow the trees instead of preserving the deadwood, and change the planting angle so the smaller trunk was not leaning over the parent trunk. To accomplish this, I decided to air layer the tree to give it a flatter, more natural nebari.