Hi all. Looking for a little insight on what I think may be an issue with my spare 310 pump. I finally got around to tearing into it to replace the seals and a general cleanup to prepare it to be put back in service. When I removed the head, it seems as though the ceramic plungers have a lot of play in them before the actual crank and rod begins to move. I would say maybe a 1/4 to 3/8". I have never noticed this in any 310's that I have torn apart. I really don't want to disassemble another one to check, so I thought I would ask on here. Long story short, is this normal? thanks. I don't remember any issues with the pump prior to being taken from service.