I'm having trouble with squaring up a large quilt top. I don't have anywhere to lay it out and due to health reasons cannot crawl around on the floor. With smaller things, I have just folded in half and then trimmed -- much like when cutting strips when you fold the fabric and cut thru layers to get one straight strip. Because this is bigger, I would have to fold the top several times to get it to fit on my cutting mat amd even then, the weight of the rest of the fabric pulls and distorts what I am trying to cut. Does anyone have any tricks to help, or do I just do the best I can and live with a wonky quilt. It is a crazy quilt with no specific blocks so I don't have to worry about chopping off points or anything like that. I just need to get it to some semblance of straight edges. Thanks.