Donnie,

I can only get you this close...back in the day SpeakerLab had a driver that could be assembled for a short time. Maybe no interest or something, but your right, it is a pretty simple device. The challenge would be with alignment of the voice coil and get the spider and surround attached evenly. At least, those are the things that come to mind. then the more complex principals of magnetic flux as it pertains to the magnet itself, cone material, voice coil type used. If it all works out, it would be scary as to what it sounds like. You can assemble two identical units and end up with two different sounding units. On the other hand, you can do very cool stuff like making the basket from a lathe process would be freaky. Imagine making a cone out of metal on the lathe. Yes, extremely thin! Or even designing a basket of your own. Yah, pretty great.