Hey thanks Phil. That's the one exactly. So sounds like unscrewing and screwing this bolt won't be an issue.
I couldn't quite get the car totally level. Had to jack the back up and deflate the front tires (haha). Took about 4.8L of Dexton VI.
Only drove it for 13 miles or so but I'm already feeling a better engagement and crisper shifts.
Cheers,
Chewy