Y axis brackets for MNG12 rails

Most of the stock Y brackets are designed to use with wheels, like on the Tevo Tarantula. The problem, that is you install an MNG12 linear rail, it raises the height of the bed, and because of that, your belt is not going to be parallel to the rail.
I raised the position of the idler wheel, so the belt stays parallel to the rails.
Depending on your printer you might have to drill the holes to the right size. But I rather print them a bit smaller, then drill, than print them with too big holes,