I've blown a pair of Goodmans Magister 15 inch bass drivers. I have similar 12 inch drivers and was wondering whether a voice coil and spider transplant might be possible. I realise that this knowledge is a little 'specialist' because of needing to know the magnet gap size etc. Obviously the drivers are now damaged so I can a go a certain way in dismantling them to find out sizes etc. I also have a Goodmans Magnum 12 inch broken driver I can compare sizes with. The other possibility would be another 15 inch driver, hit and miss I realise. Any advice or input would be appreciated. Thanks.