Hi everyone. I have several vintage machines. 221's, 301's and 15-91's. None of these machines have much harp height or width. Was wondering if any of the older machines have a large enough opening to use it on the quilt frame my DH is making for me. Don't some of the vintage Singers have larger throat/harp areas or at least larger than the ones I already have? Appreciate any info you can provide. Thanks, Ann in TN