You are absolutely entitled to growl and snap. None of us I think can avoid getting grouchy. Too much physical pain and jabs to the frustration bin dealing with other more important issues that leave us ummmsome-thing-or-other "offed" and at my age chips are easily carried on the shoulder for too long afterwards. I took no offense but I will truly accept an apology because you felt one was warranted. There are some knotheads on the face of the earth who would not surrender an apology even if they later realized they were wrong and lay on their deathbed. Woe to them via my sarcasm. They made the top floorof the retinue for my speed-bag grade sarcasm. You of course are just the opposite - a gentleman.
Some of us do our own work and a heavy duty relay for that price I felt should be shared with everyone.