Lighten the weight of the sleeping bag so it may actually be useful to me. Right now the bag is around 765g, which is too heavy to ever carry. I’d love to turn it into something more usable by shaving the weight down;
The thing is you are using pretty heavy materials in this bag, 9oz of fill with 18oz of fabric+hardware. Have you opened it up to see how much of the bag you are going to cut off to reach your goal? You mention it is too heavy – it is only 8oz heavier than my new quilt; but the key difference is that my quilt is 12oz fill, and only 7oz fabric+hardware, so I am getting a lot more warmth for my weight. Are you actually concerned about that extra 8 oz, or are you more concerned that it is not very compressible in your pack?
Keep in mind for sizing, most quilts are around 76-78″ long (unless you have a closed up footbox), 55-60″ wide at the top, tapering to around 40″ at the foot end. I’d not go much smaller than this unless you are a very small person, or are banking on the idea you are only going to use this on hot summer trips where you are likely to have it billowing open anyway.
I want to try sleeping with a quilt and see what it is like, but not ready to pull the trigger yet on a professional one;
I totally get this, and if it is a free opportunity for you to try the format, I say go for it. But discard the notion that you are going to get anything suitable/lightweight for taking out in anything other than warm summer nights.
I’m eager to cut things up.
I also totally get this. use it as a practice project, and then once you’ve made a ton of mistakes, and have figured out what YOU want in a quilt (or maybe you decide it isn’t the format for you?), then you can either go purchase a good quilt, or MYOG out of properly good materials. I prefer making my own stuff because I like having skills, I like making custom stuff for myself without the markup, and I like to make stuff for friends for gifts, or offer people stuff for a great price if I make a couple extras in the process.
You might find it better to just buy a used quilt on here (there are a lot that come up OFTEN), and if you don’t like it, you can just pass it along for sale again, sometimes for exactly what you paid for it (buy a good brand, and it will usually attract more attention for second-hand sale).
Good luck with it, I hope I am not discouraging you from doing anything; just trying to help you maintain realistic goals. Post pics, it’s always fun to participate in other peoples’ journeys.