between circuit miss?

Just checked a few things out this afternoon. Currently at 1200 RPM idle, my primaries are ONLY open by 1/2 turn of the idle screw. In other words if I back off the idle screw 1/2 turn, my primary blades are completely closed.

My secondary idle adjustment is open a bit more, obviously. Thinking about backing off the secondary adjustment a lot, and opening up the primary adjustment to get the same 1150-1200 I need to idle.

By the way, what are T slot restrictor?
Also YR, if my cruise vac is 15 to 16 a 10.5 PV still wouldn't be open anymore than the 5.5 in there now.....or am I wrong?

I guess I could just ditch the powervalves and up my jets 6 or 8 sizes, then see what happens.