I got given a PNW external dropper post but i didn't have a lever to hand, i modelled this button up which activates the dropper post. I actually quite like it as it keeps your handlebars clear of clutter, with the downside it's not quite as handy as a remote lever. Still - it beats putting your seat down manually!
It's friction fit, so just press it into the fitting on the post and it should stay there.
The author marked this model as their own original creation.