but wtf. sram already has a guide, which sux by the way, so by wanting to buy E13, is that in turn saying that the boxguide system is crap and they want something better? i dont like the idea very much at all. plus i think there would be to many overlapping products.
http://www.nsmb.com/gear/interbike05_inside2.php
http://www.nsmb.com/gear/interbike05_inside2.php