What is the difference between the two ARB bull bar winch bumpers? Apparently, there is a high mount and low mount design and the low mount is designed for an M10000 (that you may not be able to purchase any more except thru ARB). I was planning on buying the bumper tonight (since it looks like a good price, that expires this weekend), but after searching the forums, I'm confused on the differences and don't want to buy the wrong one.