Thanks to learning about these testers from this thread, I ordered a tester yesterday, and look forward to knowing what my shutters are really doing. There are many models listed on his auction site, and for those looking for one, you can see them under his page "vfmoto". For those interested, and since for some reason it took me a while to find them, I'll put the link here (not sure if it's allowed);

Many different models listed, from basic sound-card model to digital readout types, and even lists multi-paks available, such as a 20-pak.