Mendel90 adapter for herringbone gears

I really wanted to be able to use Triffidhunter's parametric herringbone gears ( http://www.thingiverse.com/thing:10707 ) as recommended by Richrap, but they were just too tall to fit on my X-carriage. This adapter will raise the Wade's block by 2 mm which is just enough to allow the large gear to fit. Read more at http://mynext3dprinter.tumblr.com