it was for him, and it was pretty much built from things laying around, much like my first gun, only things I really had to run to the store for was the propane tank and its torch cap, and the pieces needed to make the metering unit.
I guess the gun turned out better then me and him expected it too, because honestly it was a late night crazy idea and built in a mad rush. he bottom lined me and said that he wanted a gun that he could shoot asap.
it will be painted flat black most likely, and the starter trigger needs replacing, we were shooting some thick wooden bookshelves and a golfball from my gun went through one layer ricocheted off the 2nd and stuck his unguarded gun right on the button

lol one in a thousand shot rendering it totally unusable..
so I have some work to do today.. I will be putting in another spark gap in my cannon and fixing his.
do you guys have any experience with the electic push button grill starts? i saw one the otherday at walmart, they are something around $20 and fire off sparks until you let go of the button.
thanks again for this awesome site, im hooked, all I want to do is build/work/shoot cannons
-serpico