The problem was that I wanted to either make it work, or remove the bulkhead from the base so I could take the whole thing out and forget about it. I wasn’t positive how to bread the superglue bond without breaking the glass.
The ratcheting cutters is a great idea, but they don’t technically cut, they pinch, and would push either side against the glass.
I gave it a shot just to see if the glass would flex a little bit and the silicone already set somewhat and wouldn’t let the glass budge. The cutter got wedged in.
I gave up trying to avoid a bunch of broken glass and slowly pried them apart with my hands.
The secondary swimming platform idea is sadly no more.
As far as the pvc, it wasn’t as much as being able to cut them, it was more that I “shouldn’t” cut them as it could break the glass doing so.