call up the PD and ask them... also, if I were you i'd make it lockable, like, have a locking mechanisim on the blade, so that it will only cut off someone's head if you unlock the thing. if you sell it, then you should probably call up a lawyer and ask about relieveing yourself of all responsibility- probably draw up a form for the next person to sign that says "i will not be a dick, and if i am totally drunk one night and cut off my own nads with this thing, i won't sue ziadel"
good luck on your project
__________________
Sage knows our mythic history, King Arthur's and Sir Caradoc's
She answers hard acrostics, has a pretty taste for paradox
She quotes in elegiacs all the crimes of Heliogabalus
In conics she can floor peculiarities parabolous
-C'hi