Yes the circuit Jon gave me is definitely the right one. I've now added it (with due credit) to the Argus page
Progress is being made over on the other board
. The flyback line problem is no more. The main problem is that the 24Hz frame rate of some of the lower definition standards throws picture hum into sharp relief. We're now looking into that.
BTW if anyone has got a known bright
, without plate shadows, VCR97, VCR517 or CV2810 - I'm interested!