Hi all! I´m about to sell my old Yorkville 400W amplifier. It has got a 15" Celestion speaker, and somehow a couple of years ago, the cone got into a wee bit accident and was dented. At the time there was no grill on the amp but there is now. The question is, since I´m about to sell it, is there any way to correct this dent in the cone? It´s purely a cosmetic thing and the dent doesn´t affect the sound in any way, but I think I may have a better chance of selling it if the dent is fixed. Anyone?