First DIY Mummy Bag Underquilt - Need a few pointers

[FightingTheTide]

I cut up some old board shorts instead of using crossgrain for the footbox opening, but I found it might be too constricting like it is. Has anyone ever cut the bag wide-open at the footbox to where the mummy bag would be more like a blanket? I'm gonna give this a shot to see if I can get more room for a diagonal lay.

Also, this bag has a draft collar with a cord running through it. The collar is right near the hood. I'm thinking about cutting the hood off and using the existing channel in the draft collar to run my shock cord for suspension. Any reason this wouldn't work?

EDIT - I cut the hood & zipper off, and cut the footbox open. It's approx. 68"L x 66"W/46"W. I'm going to run the shock cord through the draft channel tomorrow, do some sewing, and see how it turns out.

Pre-cut footbox (it's now cut wide open)


Draft collar near the hood, prior to cutting the hoof off.