If I get a 90$ mouse that touts buttons and binding things to them, I kinda expect it can do basic things like "bind just the shift key" to a button. The one I tried cannot (Solakaka E9 pro) Instead, I found a 25$ mouse that can do that. It's some random mouse I found on amazon, but it's a vertical mouse that won't hurt me as much and it'll do what I want, I guess.