Neckbeard

yes

all depends on what basket your starting with or what motor you want to use.

No, not really. to change the motor you got to unscrew the basket. to unscrew the basket you got to cut out the cone, spider, and coil making it all junk and useless if its a good sub. Then you got to find a recone for it if one is made, or piece together a bunch of other misc parts the correct size. By the time your done, its easier to just buy that other sub you want, since its going to be costing you almost the same amount of money once all said and done.