Help with Weber Carb not returning to idle Options

[Tastyplacement]

Oh man, I am up a creek. I am installing the Tangerine cable system and one carb is fine, but after I installed the pulley, one carb is binding and will ALMOST return to idle, but it is binding on something. The carbs are rebuilt but I did not replace throttle shaft bearings. The carb works fine throughout it's range of motion except for the last 10 degrees where it should return to idle. If you let it snap shut, it shuts, but if you ease off, it sticks.

I have had this freaking carb and cable system apart and back together 5 times and don't know where to look. Carbs are Made in Spain 40 IDF

[Tastyplacement]

Ok, thank you guys. To finish this off, here is what was going on, and upon inspection I can see that this had been happening to a lesser extent:

one of the throttle stops was not tight enough on the throttle shaft, so the circular spring was pulling it out of alignment. Upon tightening the bolt at the end of the throttle shaft, it pushed the askew throttle stop against the carb. I eased off the nut, lubricated and it snaps right back to idle.

Regarding the Tangerine cable system, you HAVE to find a way to put the locking tabs back on the throttle shaft nut so you can leave that nut just a tad loose.