I can't speak for the OP, but I'm unfamiliar with where and which are the idle adjust and the mixture adjust screws. Can someone please post a pic of a DMTR/DATR and highlight/circle which screw is which?
I'm away from my diagrams now, but I can try describing it. The idle mixture screw is different for the 32 and 34 carbs, and there are two different styles of idle speed adjust.
Idle mixture:
On the 32 series carbs, it is a screw that projects from the base of the carb, at the back, head end pointing straight out to the rear. On some US-spec models it may be covered with a metal plug to prevent tampering. If the carb is off the car, you can look at the inside of the primary barrel and see the opening through with the idle mixture enters, and it's lined up exactly with the screw.
On the 34 series carbs, it is a little recessed screw in the base, on the left hand side of the carb (standing behind the car facing forward) and almost all the way back to the left rear corner of the carb.
Idle speed:
Two styles of setting, early and later. The later style is way more common on the 32 series.
Later style: There's a screw halfway up the backside of the carb, kinda over to the right of the centerline, head end points straight out to the back. This screw bears directly on a finger on thethrottle linkage, and it's easy to see how it holds the primary throttle butterfly just barely open at idle. You increase the idle speed by turning the screw in, further opening the primary. The directions posted at Peirce Manifolds and other carb vendors on how to set your idle speed and mixture are written for this style of carb.
Early style: The same screw is still there in the same place, but it is fitted with a lock nut and not meant to be adjusted - it just stops the throttle butterfly from closing so far that it would bind in the barrel. The idle speed is adjusted by turning a third screw, also on the backside of the carb about halfway up, but on the centerline. This screw opens or closes an air passage that goes around the throttle, so passes air even when the throttle is fully closed.