Gildan27's 6x6 16 tank setup would work fine, just change around the inputs/outputs a bit.
I'm new and don't know how to post a picture so think of this:
T L T T L T
O R O O R O
T L T T L T
T L T T L T
O R O O R O
T L T T L T
T is a liquid manager (tank)
L is a liquiduct flowing in
O is a liquiduct flowing out
R is a redstone block
Magicthize, what machines are you using to convert melon slices and pumpkins to seeds? I had been using autocrafting tables, but since the new update the speed has been dropped and I'm looking for a more efficient method.