I have to cut 80 HST and 80 QST and sew one of each together to make 80 units. I've never made QST's before except when I made hour glass blocks once. When you make the QST, are all 3 sides the same measurement or is there one side different than the other two? I just want to make sure I sew the QST to the proper side of the HST. The diagram isn't really very clear. Just thought I'd ask your opinions.