You mean Jack? No, he is happy with his design and an AVC or TVC wouldn't work with it as the attenuator. It has to be a 10k pot, series, or ladder attenuator. When I built my AVC using the Slagle autoformers he was curious about them (for reasons I can't mention), but not enough to make him consider changing his design. Jack could easily whip up a few autoformers though if he had reason too. Plenty of resources to do it.
