Hanna Checker Cuvette Adapter for Taylor SpeedStir

Most Hanna Checkers that I have used require a "shake for 2 minutes" step. The Taylor SpeedStir can be used with the correct size stir bar, but if the cuvette is not perfectly centered, the stir bar will just get stuck on one side and not spin. I put together 2 quick designs to address this "problem". One is a "quick print" centering shim and the other is a more robust guide that should prevent me from accidentally knocking over the cuvette while stirring. Now I can multi-task instead of shaking for 2 minutes per test.

Note: The STLs are modeled and oriented to print without supports.