Wow, I hear that!! Sure, I fumble the odd screw while trying to put it back on the machine, but it's usually the bobbin case screws, the ones I don't have over the table to catch them. I found one 4 ft behind me once. No wonder it took me 20 mins to find it. I probably need a room sized electromagnet.
I have the little magnetic dishes too and I love them, I use one per machine on my desk, but it's once you remove the screw from it that stuff hits the fan.