As long as you're happy with the final work, and the functionality and durability are there, you're doing good! Now go make the final product and show us the results! I'm interested in what you think of the quilt when you're done. Beardog's buddy said he was comfortable "well below" 40 degrees, and I have a hard time believing that. Then again, maybe he was, but for me, I think I would need a bit more loft to keep me warm when the temperature is in the 30's.
Let us know,