Things are going well. I just need to get these Fanstels working or wait for the other types of Dongles to arrive. Looks like I should look at the Documentation:
Here is the link for Nordic SDK 15.2.0
And here is the link for its’s Documentation.
https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v13.0.0%2Findex.html
which on closer inspection is not what I need. Looks like this is more relevant.
with a thread sdk download here
What is a bit confusing is that Nordic uses the term MESH for their own Bluetooth 5 protocol, whereas Thread stands for OpenThread protocol which the Particle Devices are based on.
…
This is interesting? From this site https://www.threadgroup.org/support#specifications
Is An End-Product Based On OpenThread Automatically Thread-Certified?
No. If a company uses OpenThread to build a product, they need to be a member of the Thread Group in order to gain the Intellectual Property (IP) rights to ship Thread products and to complete product certification, which ensures that products using Thread work together effortlessly and securely right out of the box.
That last line is best part, I wonder if any of the development devices work effortlessly and securely right out of the box. 
Strange that it is Open Source and Intellectual Property all at the same time, probably best to read the small print. 
This link shows the OpenThread license.