A screw loose

A couple of months ago I managed to lose the cable of my rowing machine inside the machine itself.

And a rowing machine that you can't row on is just, well, a clothes horse(!?)

To fix it, I had to open up the machine, feed the cable back through, and then seal it back up again. It took me more time and energy than it should have.

I was sure I'd replaced all the screws securely, but I keep finding them on the floor...