¼ barspoon of xanthan gum?
If you are lucky enough, like me, to own an Easy Jigger, and the author was referring to an 'American barspoon,' then you can measure 1/24 ounce.

If a Barspoon = 5 ml
then ¼ Barspoon = 1.25 ml = 0.042 oz (approx 1/24 oz)

If a Barspoon = 2.5 ml
then ¼ Barspoon = 0.625 ml = 0.0211 oz (approx 1/48 oz)

If a Barspoon = 2.4 ml = 1/8 oz
then ¼ Barspoon = 0.6 ml = 0.02 oz (approx 1/50 oz)

Bourbon, Campari, Aperol, and lemon juice make a fine Paper Plane! Some folks on the west coast are replacing the lemon with lime, calling it Ruby Sippers.

I plan to look for Luxardo every time I go into a bar, and when I find it, I'll taste it. I saw it in so many recipes that I bought a bottle. I think it's nasty. My wife thinks it's disgusting. So I keep wondering if I might possibly have gotten a bad bottle. But I'm not going to invest in a second one to find out!

Any thoughts about a sub for the Dubonnet? Punt e Mes? Noilly Prat? Pimm's #1? Maybe Aperol? ...or must I wait until I get my hands onto the real McCoy?