I just learned how to install spiro locks. Took forever to do the first one but once I figured it out they take mere seconds.
Popping them out is no big deal if the piston has the little relief to get a screwdriver blade under the spring. You gotta force it a little at first but then it comes right out.
When I was learning how to install them on the first piston, it seemed like the pin bore around the lock groove was getting a little boogered up. It's in now but I am trying to not to think about that.