Yah, 'tis! The duty on cases of engine starter propellant is going to eat me alive Marty, but maybe I can get a neighbourhood(sic) watch to help underwrite a "shore battery".
I'm also working up an air burst version of the cocoanut(sic) shell to counter low flying aircraft. I do forsee a problem in that there may be a lot more "stuff" floating around in the water once I perfect that round...