Ho Meyer sorry I didn't read for a long time this forum.
Yes I opened my CSS a while ago. I had to cut the side on my lathe, where the shaft comes out. It is glued and couldn't open. I cut the minimum to open, and made a little ring similar to what I cut out, to re-assemble and glue again.
I used the lathe also to pull strait the piston out of the solenoid.
The problem is that as it is always energized, it warms up and humidity condensate and stays in. This brings corrosion, and get all stuck.
attached are some pictures.