I bought one from Costco and found it to have more than enough power and adjustment to speed and intensity for useful therapeutic results.
I also found another use that ended up saving the day. My 280zx had a stuck passenger door lock. Neither the key or unlock button could turn the stuck lock cylinder. I held the gun with the soft ball attachment to the outside of the door by the key opening while turning the key and it was able to vibrate the stuck lock open. Imagine that.
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