Originally posted by BigDave a cheap and easily accessible item to use as a filter wrench is a longish zip tie (about 12 inches long). Use it like a flexible filter wrench (go to your local Sears hardware dept to see this). The trick is to hold it in such a way as to cause the zip tie to bind on the filter with enough tension and friction to grip the filter while allowing leverage to turn it. I pinch the zip tie between my thumb and index finger and grip the rest of the zip tie with my other fingers. And make certain when you try to loosen it you are not turning it the wrong way (righty tighty, lefty loosey, when looking at the front of the lens)!
good luck!
Great job with your set up and you saved the OP tons of hardship !
Personally, I will carry one or two of those zip ties in the bag !!
Cheers.
JP