Andy:
I have not, but will bring the 12v Bioenno LiFePo next time. I don't have a home power supply; no setup at the house.
Coax is a 10' length of RG-316, off the ground to the max extent possible. Acknowledge the minuscule difference between 5 and 6W, but it was a factor in waiting for a FT-818 vs the 817.
Matt