Another Anet A8 X belt tensioner

I wanted an X tensioner with minimal A8 modifications, and specifically I didn't want to have to get a longer belt. This should work with the stock belt, it certainly works with a Prusa reinforced belt which is slightly wider. It also hangs on that half-hearted screw that normally anchors the belt to the carriage.

Some pics show how it's mounted. Now I've got it on it works well, although I suspect the bottom of the tensioner rubs slightly on the lower rod. If that's a problem you can reduce