i3 build starting to take shape.
Hell yeah. Looking good. Need some taller threaded rods though, you can bring those bad boys all the way to the top. 
I will recut the threaded rod once its all working. Can’t remember where I got the lengths from.
That’s a beefy looking herringbone gear. Is it in the i3 repository?
It’s probably the one that goes with the Greg’s Wade extruder for Prusa i3 made by @Miguel_Sanchez http://www.thingiverse.com/thing:65939
The i3 repo has a more “traditional” Wade extruder (squarish extruder, idler not on a hinge)
@Normand_Chamberland is correct. The extruder is from @Miguel_Sanchez and its a great addition to an i3. The gears themselves can be found in lots of places. Most variants of the Greg’s wade come with them.
They look unusually thick but I think I’m just getting tricked by perspective.