Minecraft Science: Enderman Teleport Testing Revised

I realized the previous video was far from scientific as I was expecting people to take my word for it as to the results of my tests. Well, this one contains actual tests but I really should have used F3 to show the distances so again, in this regard I'm hoping you can take my word for it.

The first test pretty much rules out the use of water contact to separate enderman in an above ground mob trap.

The second test shows the feasibility of using a water method but sadly I'm thinking I may abandon finishing work on such a system for now at least because I'm sick to death of spelunking right now. Also, with 1.9's proper release I fully expect access to the "End" will be viable and we will therefore have no desire to farm enderman in the overworld.