Thanks for the terms clarification; you taught me something I did not know so always appreciate the additional knowledge. By the way, I mic'd the thrust plate and ring and my numbers were virtually identical to the measurements you provided. Plate was .1614" and spacer was .1643". I pulled it all apart, cleaned everything again and reassembled. Still the same, zero endplay as the cam journal mates with the inside of the thrust plate and the sprocket mates with the outside of the thrust plate. Like you mentioned, might not be an issue as the cam freely spins. Always appreciate the help, so thanks again.