The rubber tree sap liquid is from IHL Tools and Machines, involving a leather sack to collect it, and fairly simple to automate, as explained in the IHL wiki here: http://minecraft.gamepedia.com/Mods/IHL_Tools…oduction_branch
But how are the leather sack supposed to work ? I tried several times, and never got any liquid rubber.
I grew an IC2 rubber tree, placed a tree sack on the second log (just below the leaves), and put a GT fluid pipe under it. IIRC they are supposed to output into it automatically, so where am I wrong ?