Devo 10 with Hisky and Flysky Module Mod...

I want a good radio to fly 100 to 450 size copter of different brands and the Devos look so good for that!...

I'm thinking in the Devo 10 or the Devo 8S... but I really don't know... for now the folks said: Devo 10!!!

I'm also looking for the mods for Hisky and Flysky modules but there isn't much info about it. So I found this site:

Mcheli



And the actual pins assignment:



I want the Hisky module as my principal and the Flysky as the secundary... so...

Tell me if this is right:



Also I found these links that confirm the pins on the board of the Devo 8S and Devo 10:

Pin Ordering

Adding External Modules to Your Deviation Transmitter

Installing a module into a Devo8 Transmitter

The only thing that I need to know is if my pin assignment for GRN (GND) or Ground it's fine!

Here is my devo 10 nrf24l01 setup;

So... we have two options for GROUND (GRN/GDN) which one it's the best option?

So what was the final ground solution? Ground loops need to be avoided and there are often unexpected harmonics... did you wire up as shown here? And did your choice work out?