Got my new foams for my reference 5 and kappa 6 infinitys fri and started my refoam on the ref. 5s 1 went well and the other didn't center up right, I have done 6 pairs of refoams so far with no issues but 1 has a bad rub so I removed the foam and cleaned it all up with lacquer thinner.It appears differentthan the other in regards to the spring in the voice coil.Only a small sweet spot that doesn't rub.Could this be a bad woofer or should I try again to refoam it, simply speakers are great sent me a new foam for only 10 bucks delivered, great company, I f its bad who would have an exact replacement?