In order to convert the Eco to WiFi is it as simple as welding (I’m better at welding than soldering) a Redpine Signals WiFi module on the Eco or are there other tiny little components missing, you know, the ones that look like grains of sand? 
I was looking at this Redpine module
Yep, RS9110-N-11-22-05 (whithout antenna) or RS9110-N-11-22-04 (with integrated antenna)
Many thanks @ David@ Emrol .
I think you also need the populate the resistors and capacitor(s) that are near the wifi footprint. You could watch the cobra wifi schematic for the values.
I have been trying to do the same with my eco. I haven’t found out how i am going to solder the bottom ground pad on the WiFi module.
One way would be to build a carrier board and then connect the carrier to the eco using wires.
What approach are you taking?
I had missed that connection. At the moment I’m just testing the theory but I was planning on mounting it direct to the Eco.