Timothy wrote:

As far as #1 goes... I would put a 2 inch sheet rock screw into it. Screw
the split branch back together. This will not work on a small (1 inch)
branch. If the branch is over 3 inches, I'd select a 2 1/2 X 1/4 lag bolt.
The bolt length will vary with the thickness of the split branch. In time
the tree branch will grow over the bolt/screw.

This wouldn't blow up a chainsaw? Would a wooden peg (tapered for friction
fit) hold as effectively?