I'm not sure what you mean...I'm pretty sure I could get it to work, but I'm just not good enough with programming them. Would a turtle place a the contents of the bucket if it already had a source block in front of it?
I have a system where I bucket up the essence, but can't for the life of me work out how I can put the source block down. I know it can't be done with a dispenser, works with water and lava but not buckets of essence, it just spits out the item.
I've read about grates and floodgates but they don't seem to be in unleashed. Does anyone have any suggestions?