i recomend the vaportrail limbdriver. i use one and its awesome. theyre also probably the fastest drop away on the market, so you dont need to worry about your fletchings hitting it before it falls. I was at the proshop saturday and in an hour or so 2 guys came in both complaining about their drop aways. both now have limbdrivers. they're pretty cashy, but you can check their site and check em out and see if you like em. not sure the site but you could just search vaportrail and find it. theres lots of other cheaper ones on the market that are very good as well.