A few minor issues while chang'n the trans fluid today, so look'n for suggestions

Anyone ever use just 1 helicoil out of a kit then wash the tap, blacken it with a sharpie, and return it for refund? Don't know if that would fly having 2 coils missing.
Glad to hear you fixed it right way so the next guy doesn't have to note where the different bolt(s) belong.