Appears much better now.
File the rough edges off after you take the retaining ring off. Make the mouse body and ring surface flat again. And breaking isn’t a big deal. Just use super glue in the BREAK ONLY. For putting the ring back on, which really just keeps dust from getting in, use white school glue or rubber cement etc. It will hold it on and let you get back in later. There’s no stress here and it’s just a dust cover.
Don’t dump a bunch of low percentage isopropyl alcohol into the ball while it’s all assembled. You’ll get condensate and have to dry it on a fan. I ended up disassembling it anyway.
One of my magnetic wheels touches the metal tab. It still works but I considered using a sharp toothpick and putting the TINIEST bit of lithium grease on it, so little that it won’t end up elsewhere to lower the resistance to turning. The white retaining part appears defective/broke but it still works ok.
Mine didn't have a cover for the light sensor. There is no place for a screw either. So its not missing, just not there I think. Also, none of the pics show a cover or where it could be attached.
If it's a laptop, it IS a smear spread, not a pea or line. The link http://www.arcticsilver.com/pdf/appmeth/... says so.
Probably because the laptop pipe mounting pressure is not very high and won't spread it as much.
Example, the 15" A1226 Macbook Pro has only 5 screws and 3 chips it touches, and they aren't very close to the cores.