Button sizes - how to shrink 'em

Good sirs.
My custom buttons E: and F: (they are of the triple click type that are described in the dopus demo) take up much more space than the neighboring DRIVEBUTTONS element.
Also, none of the other buttons I've made have that huge amount of padding. What's going on?
How to get rid of the padding?

Thanks

Three-Buttons have up to three buttons inside them, each with a label that is displayed when you click and hold with the left/right/middle mouse button. They also have their own label that's shown when they are not being clicked.

They take the width of the largest label (otherwise there would not be enough space to display it when the time came).

So give the buttons smaller labels and the top-level button will change size as well.

oh okay, I never paid attention to the button filling itself with the second and third name. Thanks!