Tr8x8x2 no-backlash nut for Wanhao Duplicator 7

I don't like backlash at all. Sometimes it can be compensated easily with a careful design and construction. Some other times backlash compensation could lead to something either not useful, or even something that may generate more troubles than a good operation.
Don't really spent too much in arguing about Wanhao Duplicator 7 leading screw and nut, but having a mechanism that provides some hundreds microns play when you look for tens of microns layer height, only this alone cannot fit my engin