Saw the pics you sent, if those are the primary throttle blades, crack the adjustment screws on the secondaries open a little and bring your primaries back down just a tad, try to get the t-slots more square. Readjust the mixture, it will lean the idle a little. I see the missing brass, there still needs to be restrictions in the main body in the intersecting passage to where those brass inserts are missing, or in the metering blocks. Might be threaded, making changes if needed will be a little easier, just not as easy as on top.