The only additional comment I have before actually doing the job again (hopefully this weekend) and posting pictures, is that I could not visually tell there was anything wrong with the solder connections. But I didn't care, I reheated all of them and touched them up with a little more solder.

I think the printed-circuit board is plated on both sides, meaning that there is a connection run on top of the board and on the bottom. You might be able to spot a crack in the solder on the bottom, but it would be tougher to see one on top where the actual switch sits - and that's where the most mechanical stress is anyway.

So, visual indication or not, my recommendation is to reheat all the switch solder joints and touch them up with a very small amount of additional solder. This will make them mechanically and electrically sound again - better than the original wave solder method.

Ken300D