As some other 2020 mounting plates for The Toranado Precision Geared 1.75mm Extruder (http://www.thingiverse.com/thing:1246951) licencing do not allow any derivatives and do not use Mini V Wheels, I decided to make my own.
RepRap is about making self-replicating machines, and making them freely available for the benefit of everyone.
I don't design things for this hobby of mine to make money, so, if anyone decides to change anything, all I ask is that you give me a shout out.
It is a mix of the Openbuilds Mini V Gantry Plate (http://openbuildspartstore.com/mini-v-gantry-plate/) and the OneZ-i3 X belt anchor bracket (http://www.openbuilds.com/builds/onez-i3.3389/). Just print in the orientation shown, the design does not need any support as there is a thin layer at the boundary of the two different wheel mounting hole sizes. The TPGE should be attached using dome headed screws to ensure they do not bind on then 2020 rail.
The photos are of a trial piece to show the Toranado M3 mounting holes and the M5 wheel bolt holes.
UPDATE 12 May 2016:
When I first mounted the TPGE I found that the mounting holes where slightly misaligned. I have updated the STL to more accurately position the mounting holes.
I only use design tools that are freely available on the internet, mostly because I can't afford to do anything else. This thing was designed with Tinkercad and Sketchup. View it online https://www.tinkercad.com/things/5pzGMRPXnO7