Drakes were even more fragile than the hoppers. After stumbling upon the heat-shrink tubing idea for hoppers, which probably wouldn't work well on a mayfly except maybe Hex or mutant Labrador monstrosities, I gave the Hareline tubing (standard size) a try for a Fall Drake. A bit crude, kinks to be worked out, but it'll fish; SBS to follow
btw, the dark wing made a huge difference for me on the days I was down in YNP; flat light made seeing anything a challenge, but the black showed up very well.
Regards,
Scott