My 318 w/850 Thermoquad never idles well in gear, and stumbles off the line

Sounds like the adjustments really helped.
Great vacuum @19-20. Needle is rock solid, right?
Suggestions:
1) Please get some real hose clamps on that fuel line, ditch the zip ties!
2) Get a vacuum plug, trash the short hose with the sheet metal screw in it.
3) Hard to see in the pic, the two screws in the primary bore (choke horn) are there, correct? see photo.
4) Verify that all rubber hoses and plugs to the carb are in good shape, replace any with cracking.
5) Drive the heck out of it and ENJOY!