One thing I have found (credit to ToRPeek) with Terran is to hotkey your eng bay(s)/armory(s) with your CCs that way you can always see if they are upgrading and simply tab to them if not.
Made a RIDICULOUS difference to my efficiency with upgrades.
I use 1-3 army, 4 CC, 5 rax, 6 fact, 7 port
I have tried all production on one I am just retarded at tabing and hitting the right keys at the moment so might try again down the track.
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