Hi guys, I'm building my own ARB/Hefty/Shrockworks style front & rear bumpers/tire carrier.  I want to leave room for a winch.  How much space do I leave reserved for the winch and what holes/template do I use for anchoring said winch to the bumper?  Warn M8000 as a reference shows 10.5"x4.5" holes, Badlands Offroad (Harbor Freight) 12k lbs winch shows 11"x 6".  I could use more info/pics on template & specs/pics on how much space to leave open for a winch.