I've browsed some of your forum posts and I don't see any reason to doubt your N, F or J. Not far from the middle on E/I seems to fit, too, but I've got a mild I lean.
If you'd be interested in taking a Big Five test, the Big Five Inventory is free, and it's actually one of the more well-regarded Big Five tests (created and used by academics doing Big Five studies). And because, unlike a typical "forced choice" MBTI test, the BFI lets you choose in-the-middle or mildly or strongly for each item, it can arguably make a stronger claim that its results may have something to say about the strength of your preferences.
It's only 45 items long, so it's a relatively quick one, but only take it if you want to. I realize you may have had enough of tests for now and/or may not view the Big Five as a useful "second opinion" on your MBTI preferences.
PS: On the E/I issue...