Gordon, as I stated above, the idle air bypasses do nothing once the throttle butterflies are opened. The bypass "may" very slightly lean the just off idle speed mixture, but that's about it, I'd expect. BTW, we are talking Webers here and not Dells.
You can be OK with the washers on the idle stops, but you have to concede it means absolutely nothing in the grand scheme of things. The entire linkage MUST be pulled from where the loud pedal pulls it from to actually be able to set high rpm synch. Really.