Finished 2 more today. I'm done, time to find something else to make. The hardest part of the whole project is tying the stretchy stuff on. Got it all figured out now though.
Yes they fire the marsh mellows as far as 50 feet, but not so accurate. It shows one being fired in the video and it is no exaggeration. The ones I have seem to shoot very high. Up close you would not want to get hit in the eye with one.
I used what I had in scraps for timber. Ash, oak, purpleheart, yellowheart, and some rose wood. They are sprayed with lacquer. Shellac, or anything would work.