Yep, the injectors are on the outer side of the TBs, along with the vacuum measuring ports
(made of brass as well), and the bypass setting screws.
These screws are just above the vacuum measuring ports.
I presume for the time being I could wind down the brass screws that sit in the actuator linkage, just to give it some idle until I sort out the idle control valve?
Well, yes, but as I recall the throttle valve adjusting screw is the horizontal one in the swing arm ass'y.
The engine brake effect will be reduced, when the minimum throttle opening is increased.
The throttle position switch may also affects the idling. If the switch clicks during the throttle valve adjustment,
as it senses the minimum throttle opening, the idle may become more unstable. In this case the switch may also
need to be adjusted a bit, until the things sorted out.