Making my own underquilt, is project I have been toying with for a while and looking at your cracking effort, certainly inspires me to pull my finger out.
I am really impressed with how 'professional' the finished article looks, great craftsmanship on your part fella
It is encouraging to see how small it compresses down to. My back is still strong enough to deal with a bit of extra weight in my pack, but my pack is not a fan of too much bulky kit and your effort does not look too bulky at all, so fair play to you
Now, if you had only made it in red, it would be perfect