I have opened mine a few times to clean the wheel encoder. When it gets too dusty the scrolling can get wonky, but I just detach the whole encoder and dunk it in 90% alcohol and then put a dab of lube and then put it back together and it's good for several more months.

I managed to get the screws out without messing up the pads, and for me the mouse seems to stay clicked together just fine without any screws, so I just leave them out and can open it as much as I like without messing with the pads or screws.

I haven't had double clicking buttons yet, but yeah I had seen that the switches are not too hard to replace, so I will probably do that at some point.