Thank you for this! I wasn’t sure if there were screws hidden under the rubber feet, so I’m so glad I checked before tearing things apart. 2 simple screws in the battery compartment is simple enough, but I needed to do a full teardown and there was one more screw inside holding the board to the base of the mouse. I also had to mess with the ribbon cable for the optical sensor and that’s fine, but if you need to do the same, it will be much easier to remove the sensor and leave the ribbon attached.
I’ve had this mouse for years and love it, but mine has a semi-defective middle-click button that means I often have to mash the button for it to register as a click. I’ve learned a little bit recently about tactile momentary switches (buttons) for a project I’ve been working on, so my goal was to replace it. Once I got it all apart, I simply desoldered the old button and replaced it with another one I had. Now it works perfectly!
For some reason, I thought it said the screws were T4 when I read this yesterday, so I thought I was lucky when I found a screwdriver set at Home Depot today with a size that small (I would have gotten one with anything smaller if they carried one). I was momentarily disappointed when I opened this guide back up, but happy again when the T4 worked perfectly.
Is this guide wrong, is the label on the screwdriver set wrong, or are T4 and T3 known to be interchangeable?