EFI, Crower intake, idle problem

[Hocky]

This is what I got:
Chevrolet 547cui BB
Crower stacked intake with 8 x 2.9" throttle plates. Modifed to EFI and split the axles.
Autronic SM4 EFI
Autronic R500 CDI ignition (8 coils, wastefire)


My problem:
Have made some test starts and tried to get a stable idle. When leaning out the fuel to get to a nice 14.7AFR a get cylinders "sneesing" up thru the intake. I know this is because some cylinders is going too lean
I have made some adjustments to the throttle plates trying to get them all in sync. Have also tried to get them synced with a Uni sync tool.

I know the intake is not 100% in the axles and the plates maybe not all seal 100% but very very close.
I have can not use the idle screws at all and the plates are as closed as they can be. If I open the throttle with the idle screw I get to high idle. Some throttle plates vibrate (opens a little) sometimes and I have a feel that its maybe a plate thats a little to sealed and the cylinder is making the plate open by vacum.

I know that I must make new axle bearing and maybe replace the throttle plates and axles but not now.

Any advice?
Drill a small hole in the throttle plate?
How to get all plates to seal better?

Getting frustrated

Pictures here,
http://www.hocky.se