Enjoy Myself Mushroom Discbound Hole Punch, 4 Holes Mushroom Paer Puncher for Disc Bound Planner (Pink)

I know it says this can punch through 1 sheet of thin plastic, but has anyone tried it? How did it look? I want to make dividers for my planner.

If there's only 4 punch discs, how do you accurately punch11 for a letter size 8 1/2 x 11 inch sheet?

How deep do the holes cut into the paper? ie how long is the "stem" of the mushroom before it opens out, and how "tall" is the mushroom in total?

Has anyone used this for the Micro Happy planner? its a 4" height. Would this work?