Update: guy at the supply house said my panel wiring looked like spaghetti, so I changed one thing
A guy named Dale at the supply house in Mesa looked at a panel I brought in and said my zone wiring was 'a rat's nest waiting to short.' So now I run every zone wire along the left side of the can and zip tie them in groups of four with a label on each one. Takes me maybe 10 extra minutes per install but callbacks for loose zones have dropped way off. Anyone else got a labeling setup they swear by?