First MYOG quilt. Do I need another?

I think your width is very narrow for a 2 person quilt. My wide solo quilt is 58". Zpacks double quilt is 84" and enlightened equipment's two man quilt is 86". Just doesn't seem large enough to tuck under you. That beig said I think it looks great.

Use it until you find some characteristic that's unacceptable. Like warm weather and cold weather. See if the width is okay.

I you're unsure it's warm enough for a particular trip, bring some extra clothing to wear under quilt, or something extra to put on top, if needed.

It is wide enough to strap onto our pads and tuck under us. We're really small people. It's definitely not to sprawl and sleep, but we dont sleep that way in our tent anyway. If we moved a lot while we sleep, this wouldn't work, but we don't.

In my opinion, most manufactured quilts are too wide. If the theory is that anything tucked underneath you is compressed and no longer insulating, I don't see why quilts are made to be tucked completely underneath you, save for a small v-shaped cutout and no zipper. I think it is only necessary to have enough to tuck under to keep out drafts, say, six inches or so with a strap system like katabatic's that keeps the bag clipped underneath you. This quilt does a good job of that for the two of us.

If you make another, I would do a Climashield 2.5 that is 64" X 54" and even tapper to 44" in the footbox.

Just make it so it can be spread out like this quilt.
That would be a perfect size solo summer quilt and would work well to drape over both of you to add some good warmth.

The best thing you could do is have some plastic snaps on the corners and just snap it into place.
Just make sure the snaps are in a way that they match when it is used as a solo quilt as well.

looks fun. That shoulder draft blocker at the top is the ticket. I was never happy with a double without that thing.

-Tim