I've been in the garage piddling away my summer vacation (all 5 weeks of it).
The Beetle camper now has all its lights working and a real driver's seat with the small Grant steering wheel from Stevenson, so its drivable, well, more drivable. There's still the tires, front brakes, sway bars, etc.
Turns out the TR6 brakes issue was the pushrod, after all. The book (Haynes-the Bentley doesn't even mention it) says "don't even bother with it unless you replace the power booster". Well, those folks don't take DPOs into account, I suppose. Imagine if the books contained phrases like "If the DPO replaced the parking brake cables with rope, check that mice didn't eat through them while making their nest in the center tunnel." Anyway, it was about, oh, 1/16 too long, but it was enough.