This is my first post since joining this group. I have a pair of these speakers which have been hardly used in the 25 years or so since purchased. The foam is gone on both woofers and I want to re-foam myself. It would be the first time for me to try re-foaming. I,have been warned off this project by a number of people who say the tolerances on the voice coil,are too tight and make the job very difficult compared to other brands of speakers.Are they correct in this advice?