This creation is a work in progress. Me and a few others (Marshmallow369, 820327 and others) are working together to build a wither farm, we've done lots of prep work already, and are about to begin work on the wither grinder itself.Before I start, I thought I'd video the process, mistakes and all. Please post here, anything you'd like to know about wither farming. And anything you'd like to see in the video. So I can try to include all that as I go.NB: There are already many video's on fortress spawning areas, and wither spawning specifically. BUT there's also a LOT of incorrect information in those video's. So I may try to clarify as much of that as I can. And perhaps people far more expert than me can correct ME if I get anything wrong?I'll include it all in a little FAQ, along with screenshots and video.This build will start very soon, so be quick with your questions/requests.Perhaps I'll try to upload it as we go, as a sort of 'lets play'?We've built ourselves a 'cage' area to build in, to avoid dealing with ghast attacks breaking redstone etc. (The few bits of odd netherrack and Brick in the top corner is actually a Blaze Spawner that I sealed up.) This pic is the design we'll be working from. Something I whipped up in creative mode. Based on other designs, but also a bit of my own design. (So if it doesn't work, you know who to blame).