rockm

I would not try to crank that branch down. It would be pointless as the results will not be convincing--if the branch survives.

Since trident grow so vigorously, simply prune the branch off completely. Wait for new shoots to emerge at the cut site--there will probably be many. Select one or two as they emerge (leaving mroe than one will close the pruning wound more quickly), wire them horizontally after they start to get a little woody in texture. Let them grow for a few years until they have attained the desired thickness at the trunk, chop them back to an inch or so--you can remove all but the most promising one if the initial pruning wound has closed.

In the next few years, hard prune the branch as shoots emerge to "build" the length in sections. You get more character in the branch with this method.

Additionally, you will have to select one lead at the top of the tree and even up the trunk chop. As things are now, the top lacks taper and the numerous leaders you have will make that situation worse.