Wayne: Happy Birthday tomorrow.

I think that anyone who removes the piston as a matter of course should obtain a new castle nut. I bought one just in case I needed it. I removed the piston on my 5.6 Win when I first obtained it. It was well staked and it made me very wary of making it a practice. The most interesting thing about the piston is that it usually comes out clean as a whistle. No carbon, no debris nothing.
D