Sand generator in the farlands

There's a huge sand duplication glitch, very less difficult to make than in the normal MC.
You've to only put a fast redstone power in a sticky piston, and place sand in front of it.
Dig two holes under it, and place redstone torches. (see the pic)
And it will start to glitch a lot.

pic1: before placing sand
pic2: after placed only one block of sand