Rotten Flesh? Fertilizer should be doable already.
Ah, yes, although, I think, it requires the same element (KNO3 or NaNO3) that is used to make Nitric Acid, which is somewhat rare (the only source of it that I found is a Soulsand)
The Gates are single Tick things, the Repeaters have 2 Ticks. There is a delay that the Redstone just cant keep otherwise.
The thing is - it works flawlessly on a single player, I've found this problem only while playing on a dedicated server.
That won't work because the iron will come out as soon as it melts before it becomes steel.
Oh, right, sorry...
On a not-so-related note - I wonder if dumping moderate amounts of Glycerol in a water would be safe for the environment in real life? I'm asking because as an added challenge I've tried to built a sorta-realistic sewer system to dispose of liquids, which "dumps" its contents in a nearby dirty river.
PS: Soo... I've just learned that Barrels and Drums don't actually require compact pumps to output their contents...
*After spending 7 minutes screaming in a pillow, grabs a crowbar for those 20+ pumps...*