Okay the dual spider magnet idea has been tried by JBL, and while successfull it was much too large to make it a popular or very successfull driver. The replacable mags was done by Lightining Audio AND Volfenhag. Orion's H2 sub has a thin basket from what I can tell henceofrth the reason for its width as opposed to thickness. Personally I think a Very thick 3 spoke basket could be very efficent. Could hold up the mag and vent the VC really well. I'd be surprised if it couldn't. Make it like a peace symbol. Last but not least try using seperators on the magnets for better cooling. J