Ok so I have my small seb since Christmas, and of course I have been playing with it while watching tv. I noticed yesterday I can FEEL the blade move front to back as in opening closing direction, not side to side. Now I say feel because I cant see it move being that it is ever so slight. When I push the lock over it stops. By the way I can't see the lock moving either just a little push. By the way I did take it apart and oiled it about a month ago, and all is well in that department, thanks in advance, Jake.