I have a Ma Audio hard kore that i want to recone.  It is a fifteen and is the 5000 watt quad voice coil 1.5 ohm version.  Sorry i do not remember the model number.  Any way does fi make a recone kit that i could use and would it be possible to attach an 18 inch basket?  The other thing that concerns me is that it is a quad voice coil sub, if i get a recone kit would it just become and dual voice coil?  Any advice and knowledge is appreciated! Thanks!  And sorry for a lack of knowledge, i have never reconed a sub before!