The first time I made and tried knitting with a Yorkshire "goose wing" knitting sheath, I was just amazed at the perfection of the concept. They tuck into apron strings and sit on the point of the right hip and hold a knitting needle in just the right spot for good knitting. Over the last few years, I have made a bunch of them.
When I did not want to wear an apron to knit with them, I would just tie sash around my waist and tuck the goose wing into the sash.
However, goose wings do not work so well with the wide leather belts I tend to wear with jeans around the house. The Cornish "knitting fish" have always worked better wide belts. And, the goose wings tend poke the leather easy chair that my wife made me buy to be my "knitting chair" in the living room. (During the day, when she is not home, I like to knit seated in a folding chair in the kitchen.) Think about how many of the old drawings show knitters seated on stools or benches rather than seated in chairs.
The other day, everywhere I went seemed to have nice work aprons on sale. I took it as a sign that should do something with goose wings. Then Abbot, my favorite Smith, asked about goose wings and I knew it was time to revisit goose wings. He also likes to wear wide leather belts.
They poke, so grind off the "pokey" tips. Done!
Now grind groves so the apron strings stay in place and anchor the sheath firmly in place. DONE!
[With goose wings in apron strings the resistance of the knitter's abdominal tissue provides some spring action allowing fast, low effort knitting even with ridgid (brass & aluminium), or weak (wood) needles. This is particularly useful for lace which is too loose a fabric to use the fabric as a spring to assist the knitting. The goose wing really is a brilliant tool design. ]
Cut the "blade" thin enough to slip under a leather belt. Grind an offset tab at the end of the blade to catch on the lower edge of a leather belt to anchor the goose wing under a leather belt. Done!
They work exceptionally well with steel needles from ~6" to 12" long, but last night I was using them with 18" gansey needles and they worked very well indeed! A heavy leather belt was worn very low around my hips and the sheath was tucked in over my right buttock. Close to perfect performance (in my folding chair -I do not use the gansey needles in the leather chairs. The arm rests impair needle movement.)
Sometimes, I live in a bent world.