i did sleep with my head to the far left on the HH away from the zipper and my feet were closest
seam - i guess it would be similar to a french. i left a 1/4" of material for all my seams, so for example on the top piece i had it at 34" i actually cut it at 35", folded the edge over a 1/4" an then made a pass. i did the same for the bottom. i then layed that sewn top edge over the bottom piece and sewed those together - 2 passes.
i usally leave a inch extra of material for all my seams.
the gross grain i used was 5/8"
thanks again for the nice comments - i just try to make it functional and to last a few times.