Ugh! So yesterday I was trying out my FL-W filter for the first time. It's a 77mm filter that I mounted to a stepdown ring (62 mm B&W brand so not cheap!). In the middle of the shoot, I decided to switch lenses and needed to remove the stepdown ring. Easy enough, right? WRONG! the two are stuck together like somebody crazy glued them together! I can't budge them. Trying everything including PB penetrating oil, WD-40, Dawn liquid detergent, filter wrench, etc but I am fresh out of ideas. I hate to think that this is the end. Anyone have any other suggestions on how to unstick these?