I have an older Sony speaker and the 12" drivers had rotted foam. I replace the foam with some universal stuff because there was no kit specifically for my application. The kit did list my speakers as a fit though. Well a couple months later I checked the job and the foam is peeling away from the cone part in some places, something I feared because there is barely any material crossover to glue down at the point of contact between foam and cone. I need some advice about how to fix it without more money, thanks.