Very interesting about your dad, was he in business with sewing? My daughters took home ec sewing, then lost interest, the 33 & 26 yr olds both sew, the 24 never liked domestic, the tomboy (girl) 22 used to make simple quilts for siblings 1st borns, she's youngest, now not interested.
I like omnigrid also, but I'm losing vision, wish they'd have a way to make those tiny lines more visible. Anyone know of a ruler brand with easier readable numbers?