..... do I cut a 92"x6" lengthwise strip when my largest cutting mat is just 24" long. This is for a quilt measuring 80" square and allowing for mitred corners. I know how to fold and cut across the grain by folding from selvedge to selvedge (so is that the only way) but for such a long length have you any tips? I don't want any 'bowing. I'd rather not join shorter strips when I already have the length in my 3 yards of fabric. H-E-E-E-LP!'