Thanks for all the comments!
Adam - I finally weighed it and it is 13.85 oz (approx. 8 oz down, 5.4 oz shell/baffles, apparently .45 oz for grosgrain, cord & cordlocks)
Tim - after trying it out last night, I too really dig the envelope footbox for the space. I thought about boxing the corners too, but figured I'd keep it simple. It looks like a mermaid..er, merMAN fin...
Jamie - your design helped out a lot! Thanks for posting it.
I used the quilt last night on a quick overnighter to some nearby mountain lakes. The temp only got down to a breezy 43 degrees, and I was in an enclosed hammock (Clark NX-250), and I was very toasty.
I know some people don't like how M50 feels, but I didn't mind it at all.
View from hammock this morning:
I took my brother in law for his first night in a hammock, and he tried my Warbonnet Ridgerunner.
I gave him the best view:
Overall the quilt worked great and I'm happy I made it.