The process of making a Sonor seamless metal snare in the early 90’s. Check out this really interesting comment from this video on YouTube: “The only reason these seamless ferro-manganese snare drums aren't being produced today is because Sonor lost it's supplier of raw material once Mercedes-Benz stopped using it in mass quantities in their cars. Sonor had an agreement worked out that allowed them to buy a percentage of Mercedes' order, thus keeping the drumming world supplied with D-series sna