32/36 DGV Weber Idle

Hey everyone. I am new hear. Looks helpful.

I have a 32/36 DGV weber off an escort (same as off a cortina) and I have adapted it to suit my BD Mazda 323 with E5 engine.

I have the idle screw pulled out as far as it can go but still I can not get the idle below 2800RPM. (should be about 800RPM)

There is another screw about 2 inches below but I don't know what it is. Can anyone help please I need my car!!!???