Ultimaker Belt Tensioner BANANA style (Rev. 3)

REMIX found here: http://www.thingiverse.com/thing:84108

Since I liked the banana tuning from Jeremy: http://www.thingiverse.com/thing:45236
but some people might not want to change their blocks. So I designed a working version that one can bolt on existing UM blocks.

I prefer to use solid blocks from chasmaker: http://www.thingiverse.com/thing:22157. It allows me to bolt on the tensioner with small bolts.

Use 10mm M3 bolts for mounting to chasmakers blocks. If you use longer ones for