Tom Best wrote:

Does anyone have any experience building a yuloh?

Not witha yuloh, but plenty sculling (single oar over the transom) and
have read a good bit about them.

.. Specifically, I am
looking for advice as to whether to use an 8 degree or 11 degree angle
on the blade.

How heavy is the boat, what are the relative lever arms? A longer inboard
lever and/or lighter boat would favor the steeper angle.

Fair SKies- Doug King