Need some help from you E.M gurus, in the middle of a game the plastic post popped off the plunger. PITA to take out BTW but I attached a picture. Is this actually supposed to be a pressure fit? The plastic doesn't look cracked or broken, so I don't see how the roll pin can go through the plastic, does it really just push on from the top and lay on top of that roll pin? Seems like a bad design but I think that about lots of things, anyway TIA for any help.