SORTING MACHINE UPGRADE
The video on this page describes an overflow problem with the sorting machine. I may have found a fix:
Put a space between each of the sorting hoppers. You can upgrade your double chests so they face forward this way. You can also put a feedback loop along the top in case any of the hoppers overflow and start clogging up the system. I have only tried this in 1.5.2 --65.74.70.63 23:14, 22 May 2013 (UTC)Habib_Ackbar