I am slowing, grudgingly coming to the conclusion that the problem is ring/bore sealing and while it's possible that the rings will still break-in my confidence is not very high.
The engine was built using a Scat rotating assembly kit that included pistons and piston rings that were described as having "Plasmamoly" facing material.
Thanks for all of the input received to date. I have a list of things to evaluate and continue to hope that I do not need to pull the engine for a tear down this winter season.
