The Ultimate Minecraft Strings Farm Tower (Spiders only)
1000Strings/h (250Wool/h)
20 Bones/h (spider jockeys)
20 Arrows/h (spider jockeys)
Full inventory little over 2 hours.

In the video I remove the dirt only so you can see how it works!! It must be dark :)

Requirements:
Lots of cobbel/glass/signs/fences/water.
Having this huge amount of signs in a close area causes great lagg. As we expierence it near this tower.

How it works:
* Platforms with 1 air then glass makes only spiders spawn.
* Make gaps 3 wide so there is enough room to fall.
* Make them fall on fences+water so you can move items.
(Fences make it more likely they die with water above them)
* Leave 1 space between fences for the items at end of water.
* Make a 3 wide water below that since fences are only a 1/2 block at the end.
* Light up all area/caves outside the tower.
* The death drop must be atleast 20 (spider=16health +3 =19drop min kill). To be safe we used 26.

Negative Sides:
* The sear number of signs causes lagg. Make sure to stop adding layers when the red lag bar comes 1/2 way your entire screen. Else it won't be fun in the area of the tower.
* Some spiders survive the fall, but will despawn or die later by climbing and falling again.
* When 1.2 comes out the signs will no longer work!!!! ("Mobs no longer attempt to walk over signs if the drop below is too tall. ")

!!!!!!!!!!!!!!!!!!!!
When 1.2 comes out I already have an functional idea for a better design. That should also reduces the lagg.
When I have this new tower 1.2 functional I shall make another vid.
It is similar to our Spider Eye Tower wich video I might release earlier.
!!!!!!!!!!!!!!!!!!!!