I'm very interested in making a ball chair for my room and if it turns out great, sell it with profit. I have yet to search into how exactly I am going to do it. I was thinking about making a metal "skeleton" to support the weight of the person. Then make molds for the external shape and use fiberglass. This way I can make more chairs if sold. The thing I am wondering is should it be made as a whole or two pieced(the outer shape). If whole I have to do the skeleton welding inside it - PITA. Two pieced - perfect seam between the two. The inside will be done with some soft material, wrapped in texture(no problem here, my parents own a clothing shop). What do you guys thing? Want...