127T change gear to fit to 100T change gear

This is a further refinement of my prior 127T design to enable machining of metric threads on Harrison L5 lathes. See my other designs for other lathe gear variations. http://www.thingiverse.com/nglasson/designs

The gear that this is re-mixed from takes a long time to print and it occured to me that it would be a simple matter to design a gear with 127T on the outside and 100T on the inside so it can be mounted on an existing steel 100T gear. Either the 100T or the 127T is normally mounted