I have just come home with a metal Getzen clarinet. the Pads are shot. Got it for about $15 USD. Don't want to spend any money on it and I'm better than good with tools, owning my own machine shop. When i went to Ebay, I saw a ton of pad sets out of China. They come in various sizes and materials. Each one of these ads started with a number.... I guess indicating pad set specs. I don't know what to order. Any ideas ? Are these sets all junk and I should buy somewhere else ? advice ? Thanks.