Thank you all. It amazing what you can find video on with U tube. I had to go to several sites to find anything on the "B" screw adjustment tho. Most of them only wanted to talk endlessly about the hi and low screws.
After looking at Scram sites I finally found a definate measurement on one of their sites.
For anyone that may want to know the recommended clearance is 6mm between the large freewheel and the upper derailer sprocket. I assume this is only for Scram, but might work on other brands.