Gordon, I think I get why you're letting Kodak do the rest.
After 20 years of putting up with this, you're certainly the best judge of when enough's enough.
But frankly, I wasn't expecting them to run right immediately after resetting everything to 'factory' specs. If I've learned anything about these carbs, it's that nothing is predictable. You've got to start with whatever you've got, listen, and then gradually nurse it to where you want it. And at least some of the numbers end up being not what you were expecting them to be.
Mine likes 57.5 idles. Moving down one notch to 55's makes all hell break loose. The bibles and the gurus say that shouldn't be. But on this motor, it is.
I had everything dialed in perfectly for like, a year. One day, someone following me said I was running 'a little rich'. I changed the mains down from 140's to 135's and, again, all hell. I had to change all the mixture settings and L to R balance to bring things back in line. But it still would only run right when warm OR cold - not both. I gave up and went back to 140's. But it still ran like crap until I was gradually able to dial it in again. A month later, I was finally back to where I'd started.
I'd think with everything new, it would take at least a few weeks of tweaking to get balanced again.
Another thought is that, after 20 years, wouldn't the main shafts (what the butterflies are attached to) be loose in their bushings (or bearings, or whatever they ride in)? I thought that all carbs had to be rebuilt in time to fix that.
In any case, what you're doing should get any such issues resolved.