Drive is fine, trust me I checked!
There is a sweet spot for it too: too long, the HOT draws too much current and replates, too much and the HV falls. It's also very sensitive to the values of the coupling caps in that section, a 100 Pf is enough to make it throw a temper tantrum.
I think it has a weak pix tube though, no matter what I've done it's kinda dim. Still OK picture with lights dimmed, but nowhere close to the picture quality my Philco has.