I have an old Dyno Comp that I have built up, but not really had the chance to ride yet. I might have to try out your loose ball method of headset. I am running a 1 1/8 fork, but I'm not to sure how the headset is going to hold up how it is. The cups(1 1/8) were just ground down to fit the frame...but they might end up coming lose.
I will have to post the Dyno up in the vintage build thread. And thanks for sharing that loose ball method with us that are trying to build up old frames with new parts. Very cool.