Why is it so hard to get good advice !!???

You're getting there Franken... Something to always remember: the engine is a combination of mechanical systems that have to work together. So when you're working on degreeing, the cylinders will fight you if they still capture pressure. It's like replacing the starter. The headers have nothing to do with it, and you can possibly fight your way around them, but in 10 minutes you can have the header unbolted and out of the way. Before you start doing something think about what you're working on, and what might be working against you to do it, and how easy it might be to address that.
If the degree whell is moving you will get all kinds of errors. My wheel is older and bolts on using a bushing and the crank bolt and I put it on with an impact wrench...lol.
Lastly - the cam turns at 1/2 the speed of the crank.
If you move the cam gear 4° you changed the cam's installed centerline by 4°.
If you move the crank gear 4° you only moved the cam 2°. If indeed you need 4° at the cam, you have to move the crank gear 8°.
In the case of your moving the crank gear 4°, it should degree out to 108°. So you were close. I go through the steps 3 times to make sure my result is right and repeats. If you are within 1° I would not worry about it.