Blueprints aren't that helpful as each setup will be tweaked for local materials and availability. Just start cruising for examples, find features you like, make a trip to Home Depot or wherever, and start banging the thing together.
2x4's. Some carriage boats and nuts and washers. And all the doohickeys you can think of. Lay them all out on the ground and your design will become pretty obvious.
In Process: Mango Beer, Homebrewers Pale Ale
Bottled/Kegged:Spicy Light Rye, Rice-adjunct Pale Ale, Mild Bourbon Porter, Roasty Stout, Basic Light Mead, Bourbon County Stout Clone
Up Next: Berlinerweiss, Chocolate Raspberry Ale, and American IPA