Good question! I would have my 15-91 for FMQing. I would have my 1907 27 treadle for piecing. I'd have my featherweight for ruffling, tucking, and everyday sewing. I'd have my 66 treadle for sewing anything I could get under the foot! I'd have to keep my Janome 10001 for embroidery. That's about as thin as I could get my herd, I'm afraid.