Whoopie! I have an A&P ticket also, with a few pluses to add to that. So what?
Use what you want, but don't get offended when you opine and others do not agree. After all, it is a forum made up of opinions, and I did say we have a difference. I certainly did not expect to change your mind.
BTW, if the first cover leaked, the proper procedure would have been to true the mating surface. Maybe your difficulty cleaning the old gasket material off was due to a previous install with sealer because of a warped cover.
But, your bike, so do as you please.
And, although it was not my post, even I could figure out that the 350 mention was just rhetorical.