Got vintage tuners? This tool for tuning is just the thing. And it is super simple to make.
Get a 2 1/8 inch length of 1/2 inch white PVC pipe. Don’t use the beige stuff. Drill a 3/8 inch hole perpendicular to one end.
Glue in a 3 inch length of 3/8 inch dowel rod.
flatten 1 inch of the other end in a vise. Channel Lock pliers will work too. Crush the end just enough so it fits over a tuner grip.
Tune like you own it!
Selling these for $15 free shipping.