They can be hard to remove.
Pliers can work but if you have good finger grip, you can pop them off.
If you’re using Z-stacks, the string trick is best. Thread a yoyo string under the stack, twice if you can, one on each side of the hub. Pull up. Works good.
This is well documented and is on YouTube too.
just yank out hubstacks?
I usually just pull them off.
Z-Stacks, I would use a loop of string.
with hubstacks if you slightly pull them off usually I am able to get a loop of string around the stack and pull it off that way
Look it up on youtube if you’re having trouble