This is the first time that I have actually sat down and tried to grade a pattern by hand. It's a big deal to me. This just might open up a whole world of possibilities. But before I get ahead of myself. I used two different methods. First, I tried the shifting method. The promise is that "this is simpler, quicker, and quite as accurate as the [marking and slashing method] (Woman's Institute of Domestic Arts & Sciences, 17)." But it came with a warning that "the beginner will do well to master the [marking-and-slashing method] before taking up [the shifting method]."
I have to agree. The marking-and-slashing method was certainly more time consuming but I have to admit that I felt more confident doing this method over the shifting method. I found that my side seam and shoulder seam were off by an 1/16" to 1/8" when I did the shifting method, where I didn't have any issues when I did the marking-and-slashing method.
I was most worried about how the sleeves would turn out on the marking-and-slashing method but they fit perfectly. That has made this little vintage Pattern Designing book a treasured item in my workspace.
All that is left is to have these muslins fitted. Fingers are crossed they work out.