High Idle speed with idle screws all the way out, 40 IDFs on 2056, synched Options

[AE354803]

I have 40 IDFs on a new 2056 (webcam 494 cam, 050 distributor, compufire points). Carbs were just rebuilt and are clean, new fuel pump, lines and fuel filter.
My current jetting is
130 main
F11 emulsion
190 A/C
50 idle jet
32 mm vents (31.5 mm actual ID) there was no marking on them.
45 2ndary vents

I preset the carbs as described in tom wilson's book. Timing is set to 30* BTDC at full advance. Once I had everything synched my idle was about 1000 rpm and very steady. I tried to dial it down to <900 rpm as stated in the book. In order to do this my idle screws are backed out entirely and the only way to lower the idle speed is to attach extra return springs to help pull the throttle plates closed.

I'm not sure whether I should pursue getting the idle speed low or just leave it at 1000 rpm. It idles really well there.

Air Bypasses are all less than 1.5 turns out. Idle mixtures started at 3 turns out and were adjusted per the book from there.

Not sure where to go with this one or if I should just leave the high idle.

Thanks, Andy.