4885 Creations Jolot 1. The "piston" : a device that when a current is applied will push a block, enemy, or person away from it. :: 2. the sticky "piston": a variation of the piston discovered by a slimeball falling on the piston after completion. any block pushed stays attached to the piston. useful for hidden passages.:: 3. The A.A.F.D. (Automatic Arrow Firing Device) : a variation on something i saw called a "dispenser". by recalibrating the mechanisms. i found it would fire arrows at the push of a button. not easily mobile but could make for static defenses. :: 4. the "repeater". finding that redstone can only be extended so far before the spark can't travel anymore, a little tinkering with redstone torches helped develop a device that allows for the spark to be strenghten and "Repeated". by changing the length of the two torches can cause a delay in the repeat. very useful for complex redstone circuits.