Unfortunately yes it does make it heavy, but it has to be solid for the hinges to work. So there is that tradeoff. But for lighter weight instead of wood you could probably use foam and instead of hinges use velcro or something.
Thanks for the info I better get to work if I wanna be done by July 28th lol. But being made out of wood won't make it heavy will it cuz I also wanna strap it to my back?
Well thanks for the interest, but I made it for someone so I can't sell this one. The way I made it was I used two 1x10 pieces of wood, cut and shaped them. I got three locking door hinges that I carved slots for and attached. That's basically it, it just takes a lot of time and patience for it.