Hello, I have a Festool Edge Router I purchased some time ago but just found a need to use. It has a metric collet on it and comes with a 1/4". I need to swap the collet which I expected to be pretty easy. The nut comes off but the collet will not budge. This unit has never been operated, so it's brand new, with no rust, etc. The manual just says loosen the nut and pull the assembly out together and keep the assembly together. Is there some special trick or is this bad luck? Any ideas on how to get the collet out?