I'm thinking of building a semi-automated defense system using a series of Sticky pistons, hoppers, droppers, normal pistons, dispensers, and a skeleton farm. I'm on the design phase now, but plan to build, test, and implement it into my Ultimate Gregtech server. Does anyone have any that they use that they can show off or any plans of their own? While I plan to use some mod items, I'd like to be able to design the entire thing to be usable in vanilla, though movement of Dispensers will be the hard part.