I shall add here info that I find good and helpful on developing trident maples. Some of mine and some from other blogs. The idea is to point people in the right direction, with less effort.
This blog contains very well documented info on growing trunks on trident maples , and some on branch development. Also on grafting, fusing, air and ground layering, root and nebari development. I found it to be a valuable resource.
This photograph is from the same link and belongs to Al Keppler: Just to show you what to expect from this link. This trident trunk was developed from scratch by Al.