[bleucamaro]

read your PM, and other posts in the thread, and I don't think that traditional CF, or even FRP (firber reinforced plastic) is something you want. I'm not a golfer either, but I do remember a little about inelastic collisions from physics. It seems to me that the more rigid the striking object, the more energy is transferred to the object being hit. Now, I have absolutely no idea about controlling the ball, but I think the face geometry, its relation to the shaft, and the CG of the club has something to do with it. To make a prototype, I would probably build it out of a rigid metal frame/face with adjustable shaft angle, and adjustable weights. Then when I got it so it felt good, I'd injection mold around it with a high stiffness low density plastic.

If you already have the overall mass, the CG location and all your geometries set, Why not a metal face/frame with weights attached, potted in a resin, or injection molded. Also, knowing the density of the plastic, you could reduce the added balance masses.

Was the monolith idea to serve a price point, or for aesthetics?