I own an 87 and a 414, I have a couple other all purpose microphones that I use for room sounds or amplifiers but my favourite mic is the PZM because it’s like a toy. I unscrewed them from their metal plates and then experimented with other backing like wood or plexiglass or even weirder ideas like taping them to someone’s head or strapping them to someone’s back or putting them in a plastic bag and submerging it. Awesome times with PZMs.
They only cost $40 each when I bought 4 of them in the 90s before the patent ran out and they became a much more expensive Crown manufactured microphone. Ray Conovskis tipped me off about how to boost their frequency response and then I was off to the races. There are modification pages here. Maybe because they were inexpensive I felt it was easy to screw around with them. Cheapness helps one experiment no?
Geoff Emerick’s book (the engineer on the Beatles recordings) documents the zillions of takes of every Beatles song. I think because they were not charged for studio time, they felt free to experiment to their hearts content. It is unlikely one can make great work if one is at the same time freaked out about how much every thing costs every second.