Delta Linear Rail Carriage Adapter for GT2 6mm wide 2mm pitch Belt Tensioner used w/Duet's Smart Effector Carriage PCB

**Update 03/28/2019:**
By request I added a new version 4a. It is the same as 2a except it is for 9mm wide belts.
Also added a 9mm wide clip.

**Update:**
By request I added version 3a which is 4mm higher than 2a.

The [Duet Smart Effector](https://www.duet3d.com/DeltaSmartEffector) comes with 3 PCB boards that are meant to be used with MGN12 Linear Rail Carriage Blocks.

I looked around for something to secure the Gates GT2 6mm belts to the Duet PCB and the MGN12 carriage blocks. I di