Here is my controller setup as of today
sorry for the bad picture not sure why it turn out that way 
I have ipad mini 4 with wifi and cellular ( cellular is not turn on I wanted the GPS module)
tablet mount ( I choose to get a mount that uses the controller arms this way if I change my antenna it wont be in the way and so I can see the controller screen too!)
I took a camera bag strap and mount that to the tablet holder
I also add a wooden leg extension to help hold it away from me.
I didn't want to take a chance of metal being close to the controller so my tablet holder is plastic! I also uses plastic bolts to mount the leg I made to the tablet holder!
The camera strap also has plastic clips



I have ipad mini 4 with wifi and cellular ( cellular is not turn on I wanted the GPS module)
tablet mount ( I choose to get a mount that uses the controller arms this way if I change my antenna it wont be in the way and so I can see the controller screen too!)
I took a camera bag strap and mount that to the tablet holder
I also add a wooden leg extension to help hold it away from me.
I didn't want to take a chance of metal being close to the controller so my tablet holder is plastic! I also uses plastic bolts to mount the leg I made to the tablet holder!
The camera strap also has plastic clips

