You guys are working at this too hard...... Use 1/4" spring steel rods to make the bow arms. Without the wire strung they point outwards at a 15 degree angle. After stringing Stainless Steel fishing leader (0.022 in), they will bend inward to give a proper amount of tension. Easy. Rick Powers RPV Industries RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]