Rivet Squeezer Gauge - 1/8"

I'm building an airplane, which involves a lot of riveting. I use a pneumatic squeezer that requires you set it's gap according to the length of the rivet you're using. I designed this tool to make that process a bit easier. There are gaps for -3, -3.5, -4, -4.5, -5, -5.5, -6 and -7 length, 1/8" diameter rivets.