I did try tightening some of the tub bolts, but I couldn't reach
the ones at the sides very well because of the tight clearance
with the cabinet side. The bolts I could reach were not very
tight, so it does seem like a good idea to give torquing them
down with a flexible-drive tool a try.

Thanks for the reply---that method does sound more
straightforward. I had read the "flip it on its back" method
somewhere, though, so I guess I thought that was the way
people do it.

Best regards,
John