Q-Jet rebuild problems

[Justins76]

I was told to check for a worn throttle shaft by spraying carb cleaner on the shaft on the outside of the carb and seeing it the idle change. When I did that it sputtered and wanted to stall. I assume the shaft is worn out from 200k miles and needs attention.

How hard is it to DIY rebush the throttle shaft on a Qjet? A shop sold me some brass tubing to use as a bushing, but they wouldn't install it for me since the shaft has to be drilled out bigger to fit in the bushing and it wasnt worth their time. Local carb shops seem to be hard to find nowdays and a decent carb from the junk yard is impossible. I really would just like to reuse the orig carb.

Also, the air valve plates on the top of the carb are sticking too. They are hard to move by hand for the first 30 degrees or so. Once full open, I can let go and they will spring back but will hang open about at 30 degrees as well. More a/v spring tension does not seem to make them close any better. Seems like they are binding up. Even with the 2 plates removed from the shaft, it's like a bind. Is there a way to bush these like the throttle shaft?
Thanks