My current Stephen West project, the Resplendence Shawl, has a sort of feather-and-fan section where it’s (k1, m1). He specifies using backwards loop for the m1, but I find them quite hard to work into on the return pass when they’re part of a k2tog.
“Normal” m1s or other lifted stitches tend to fill in the gap too much. In this particular case, you WANT there to be holes!
To complicate things, this is done in laceweight suri alpaca, and it really doesn’t like being knit and then tinked very much. So if anyone knows another “airy” way to add stitches, I’d love to know. Or a trick to make the backwards loops looser.