Down Underquilt Questions

[chrislrob]

I'm planning to convert an old lightweight "featherbed" into an underquilt. I am 6'1, 280 lbs. Wondering how to properly figure the dimensions for my UQ. I generally don't like half or three-quarter anything. The featherbed is 7x7,so I am hopeful that I can cut it in a way that will work.I had hoped to have enough to make an overquilt, too, but clearly I won't. My plan is to cut it, finish edges with...some edging that I first saw here, encase in some waterproof material, put some channels on it, and try it out. I like to think of it as "down and dirty". Get it? Down and dirty!

I kill me...

Edited to add: Naturally, I just noticed that someone posted that they are modifying a featherbed, too. And that led me to realize that i really just have a feather quilt, not a "featherbed"!