Let me understand this: you achieved smooth LOP operation by playing
"musical injectors"?

Well, no, that wouldn't be legal. But when my engine ran rough, I
suspected injector fouling and cleaned the injectors (my A&P
supervised, and the cleaning was properly logged). Since there was no
rule saying that each one had to be returned to the original cylinder
(they are, after all, identical) I didn't bother with that. Once the
engines started running smooth, I stopped cleaning the injectors so
often. Once a year is plenty. And I keep track of which one goes with
each cylinder. No rule against that, you know.

Michael