Got it done. I think it turned out great in that it fits great, came in under weight, and how I imagined it. Definitely not going to win any sewing contests but I think the sewing is all strong and sound so that is really all that matters to me.
A special thanks to Chris Muthig, I mainly used your guide at http://kringlelight.wordpress.com/2011/11/15/sin50/ along with measurements of Enlightened Equipment quilts (thank you Tim).
I used 1.1 oz nylon ripstop from www.thru-hiker.com and 5oz Climashield Apex insulation. It came out 59" wide at the head, half taper to 48" at the foot (can't hardly see the taper in the pics, it is more pronounced when you see it in reality), 80" tall and weight came out at 25.2 oz. I was going to be happy if it came out anywhere under 27-30 oz. I wanted it to be a big quilt, I'd rather go down in future quilts versus having it come out too small. So far seems to be just what I was looking for, plenty to tuck underneath me.
I put a drawstring at the foot, not at the head. I put a 20" Velcro foot box enclosure then I put two straps of Velcro about 6" and 12" above the foot box flap. I left them long for now but will probably cut them down some.
I sewed it differently than Chris did in his guide. I took the two main pieces of sil, pinned them (a bunch) on top of the insulation then rather than using strips I sewed from on top of the sil down through the two layers and then the insulation so that the foot had the sil to slide on and I didn't have to mess with strips of sil or newspaper. I think it worked well. I just sewed the 3 sides, (since I didn't want a draw cord at the top/head), reinforced the Velcro tabs and flap, then flipped it right side out, added the other 20" velcro to match the flap, then did the drawcord in the foot box to close it up. No complaints how everything worked out.
The one thing that concerns me is the temperature rating. It does not seem like it is going to work down to near 30 degrees but I could be wrong. I plan to sleep fully dressed including down puffy coat. We'll see soon enough, I have a trip planned this month in N Georgia and it should be around 30.