This may be an odd request, but can anyone weigh their original M.U.S.H.A. manual & artwork insert for me? I just want to confirm the authenticity of a copy I own. I am also a coin collector so I have a jewelry scale, and I weighed my manual & artwork. The manual weighs 18.44 grams & the artwork weighs 3.97 grams. I also weighed the artwork insert for "Air Diver" since that was also released in 1990 by Seismic, and it's exactly the same weight as M.U.S.H.A. I see so many copies and reprints, and I'm quite certain a reproduction manual would weigh significantly more since it would likely be printed on heavier photo paper, but I don't have (or know anyone else who has) another manual for comparison.