How to upgrade the Peterson StroboRack with the Pro Expander Module. Dan Sindel demonstrates the installation process of the SR-EX StroboRack Expander™ Module. The SR-EX StroboRack Expander Module takes only a few minutes to install and it makes tuning all the following instruments such as Hybrid Guitars,Stereo Guitars/Basses,Balanced Instruments. If you own a StroboRack, you know you’re already on the cutting edge of tuner technology, let the SR-EX StroboRack Expander kick it up a notch! The SR-EX StroboRack Expander Module fits easily in the rear panel of your StroboRack and increases its capabilities far beyond those of any tuner on the market today. It’s affordable, takes only a few minutes to install and it makes tuning all the following instruments such as Hybrid Guitars,Stereo Guitars/Basses,Balanced Instruments and Touch & Tap Instruments possible. Original music provided by Dan Sindel