Originally Posted by Greylocks
Get anything that the authorities tell you on paper, in writing, even on email, and get the paperwork officially signed.
Words dont mean crap.
As for the mortar, if you use a piston system with a spring to power it, I posted exactly that concept for anyone to use on these boards a few years back. So it will be impossible to copyright/license the idea.
My idea doesn't use mechanical power, through testing I've found that over time mechanical things end up breaking down alot quicker than something that's air powered.
Mine used a pressure imbalance.