There is a thread a week about spark plugs.
Answering the same question 50 times a year doesn't help anyone. It just adds to the problem. There was a thread only last week and it was answered quite well I thought.
And yes I was being sarcastic but I'm like that sometimes. The people that know me would usually laugh, those that don't might think I'm a prick. I don't mind.
I help the ones that I can help, I don't help the ones that don't help themselves by searching first.
To answer your first question, there is no flaw in your method. It's sound advice and I feel that the question was answered appropriately so I made a very clear sarcastic remark to make a point. I just didn't know I would be arrested for it