But you wouldn't be wasting the sawdust if you turn it into fertile soil (provided you maintain a healthy C-N ratio)! For this reason I don't oppose the two-chamber system, where I always like to apply a very generous amount of C. Besides, those dual chamber loos can be source of funny situations: At one of the farms I've worked on, where there was such a system in place, we once heard a shrill scream, and saw this girl - a fellow wwoofer - come running out from the composting toilet. Apparently she had startled a bat hanging in the chamber, and the only way for him out was to fly up, right between her legs!
I didn't see your name on the list - should probably have checked more carefully, but you won't be the only one to pass it twice. At least you know someone to send it who won't appreciate it! Cheers to that!
!BEER