I put the nitrous into the frame rail. It is a PITA to refill but I don't use that much. Mostly when Joe is close to me.
Here is what I found. The shaft was pushed all the way out and the dust cover was pouched out in front. That was why the shaft would not push back in. I pulled the metal ring out and the dust cover came loose. The piston was just fine, it moved back easily. I adjusted the dust cover so that it was on the inside, put the ring back on and re-installed it.
Now all I have to do is bleed the darn thing. After s mouth full of Motul, I ordered a pressure bleader.
Thanks for everyone's help.
Big Dog