I have a watch where the movement was ever so slightly loose in the case, with a bit of play so that it moved about a little bit when the watch is re-oriented. I think it's like that because the edge of the case near the crown has worn and there's a slight gap now between crown and case edge. To remedy it, I cut down two small sections of (light brown parcel) rubber band lengthwise and slotted them in the gap between the movement (holder) and the inside edge of the case. Screwed the back on again and it seems to have done the trick, but my question is, will it be okay like that? Is there any way it could be harmful to the movement, and what other (easy) alternatives are there please? Any help much appreciated .