I designed this up to work specifically on the Cane Creek shock I have, Db IL Air. 

I looked about and found nothing that worked as I wanted. Issue being the torque required on the high speed valve adjusters. Also it's a tight fit in that area, so needed something small. The “thumb wings" also work an indicator to help you keep an eye on the number of turns you have put in.

Made to be a semi tight fit on the bit as it's a permanent thing. But pulled hard they can be removed so you can replace it.

Printed with 3 walls, 0.2 layer height and 50% infill. Ironing was on too just to make it look pretty!

Made a knurled one too if that's your bag, more of an aesthetic thing really!

made mine in PLA for now, but PETG might be better for longevity.