There's a reason I don't post in the GH forum any more... too many big egos there and the moderators back the high-profile users there, good or bad.
There's a
manual for the DD that tells how to set it up. Basically if you scan with a complete signal list parameter of "2", it shows more signals.
viewtopic.php?f=8&t=1140#p5361Then you just pick what signal you want to show and where.
The SG allows you to add signals that aren't detected, the DD doesn't unless you request the feature and they have time to add it. This happens all the time and that's how I manged to get Ford hybrid signals added. When I first got my DD I had very few signals to choose from. The Ford extended license does add a lot of signals, many that you probably won't need. You can add Ford Extended and scan for signals to see what's available, you just can't actually use them w/o purchasing the license.
I tried to install x-codes in my SG, but it was too old. When my wife bought a '09 Mariner, I swapped SG's with her so could use the x-codes, but haven't had the need to do that.
I use a Y-cable to use both SG and DD. The only SG signals I'm interested in are the trip mileage (tank, default, today), which is more accurate for me than the single trip mileage Ford provides, which I only reset when I top off the tank. I also have the real-time mpg, which I use a lot, in addition to HV battery temp, SOC and engine coolant temp. The Y-cable isn't the best and I have to reboot my DD on occasion, usually at startup if something reads zero. I've never had to restart the SG tho.
TFT doesn't ring a bell.