Just tried turning the baseplate around but still a bit of play(although I'm sure I already tried that) , can you tell me if you just put your top cap onto the bottom plate without a blade do you get any movement , mines wiggles around and you can move it a mm ( not much I know ).
Besides that cant' fault the shave , not had a bad one yet.
When I hold the baseplate and cap together with no blade and without the handle there is a small amount of play. Once the handle is screwed down (still without the blade) there is no movement whatsoever on my S1. Same goes for my M2.