I made my own. My piston kept sinking on my chair, so I got some 40mm waste pipe I had lying around, cut it to length, then slit it once lengthways.
I put it over the piston (pulled the pipe wide enough to slide over the piston, not easy, but doable) and wrapped it with duct tape to stop it pinging off.
I made my own. My piston kept sinking on my chair, so I got some 40mm waste pipe I had lying around, cut it to length, then slit it once lengthways.
I put it over the piston (pulled the pipe wide enough to slide over the piston, not easy, but doable) and wrapped it with duct tape to stop it pinging off.
It is still there 5 years later.