I am shopping for a new chain and sprocket set. My stock chain is ready for retirement. I would like a chain that I don't have to tighten every time I ride. I have seen the sidewinder advertisements and have visited their web site. Although the prices for the o-ring chain and the titanium series sprockets are high, the claims that they make are impressive and the quality looks high. Are any of you using their components and are you happy with them? Can you recommend any chain and sprockets? Also, I am wondering if I should stick with the stock gearing. I ride mostlty MX. I would hate to buy A $150+ rear sprocket and wish that I had one with more or less teeth. I know that gearing depends strongly on rider preference and riding area, but any advice on these subjects would be greatly appreciated.