I have yet to get out in the field with mine, but I have set it up in the yard several times to play around with it. My corner lines are about 1', the two side panel lines are about 2', and the "front" (where the door is) and "rear" lines are about 3'. I plan to basically stake the Duomid to the ground (i.e. use the corner guylines, but pull back all the excess line so that the stake is next to the line lock at each corner), and use the front and rear lines to create the brow for ventilation.
As for the pole height, I am setting my pole at it's max height of 140 cm (55.1"). That height setting along with the supplied 6" pole jack allows for a decent pole offset with the corners staked to the ground.
I should be getting out on a hike with this thing in a week or two, and I'll report back if I make any changes to lengths or pole height.