3/5/2013 6:03 PM
There is an upgrade, they no longer use the steel stock you see welded there. When it doesn't go all the way down it tends to jump / push itself off the cylinder, wearing the cylinder. You may need to replace the cylinder so that there is a flat area for the new stopper to rest up against. The new piece is like a half cut piece of tubing that will rest on the cylinder and works great.
Regards,