Ive put a zoom gear on my olympus EZ 14-42 so it works in my housing, however it is so tight i cannot remove it. It does still work with it attached for topside, but looks and feels a little chunky. Am i missing something obvious? I dont want to lever it with a knife if theres an easier way, or it there a lubricant i should apply to help it move - if i ever get it off. Thanks