Well, i didn't find it anywhere else so i have to ask again . Can you make left clicking on dispenser make it shoot? I think it's quite easy(maybe i'm wrong, im not java programmer...). Just i want to make some balistas in my castle xD, and i hate when 50% of my inventory is arrows when i am carrying a bow with me. So , dispensers(aka. balistas) would be static shooters. But still, if you'll hold the mouse button it would be destroying, like normal. I think it would be useful, not only for me.
you can actually already do that without any plugin, look at this: Dispenser Button Control You can put the button on the front aswell ^^ Hope i helped c: