"Sonically it grates a bit, but I'm no engineer who can tell you what to tweak."
I agree and am trying to tweak as per tayc's previous comments. I may go back to the drawing board too, there's something there that's not right (that grates

)
Having these opinions is progress. Thank you
Dude, you have a great voice and old-time-rock'n roll is not a common genre here , kudos.
You also have a great attitude about making progress which will pay dividends.
If I were to offer any suggestion it would be the intro needs a little work, I think the vocals came in too early or too late; in rock think symmetry. Also, pay attention to how Bob Seger, Chuck Berry or Bad Company transition between their verses.
Keep at it man, you have talent.