One of the complaints about the Polish Lavvu tents is that there isn't much room in them. I would concur; at 6'6" I could not stretch out comfortably in mine without touching the canopy at some point. One way of increasing the available space is to set the two shelter-halves a little apart and cover the gap with a tarp. I was asked earlier in the year if I could make a more permanent job of such a set-up. This is what I have done ...
I set up a goalpost arrangement between the two halves;
and rigged a canopy over the ridge and joined it to the halves with zips on one side and Dutch lacing;
Practical use will decide which is the better option.
The ridge pole is accomodated in a velcro-ed sleeve which keeps the canopy in place if one (or both) sides are poled up;
The light coloured canvas was used intentionally to admit light to the tent interior when the tent is closed up.
I will be posting more pics later.