The amplitude, how far it pushes, seems to be what separates the pricey Thermaguns from the cheaper clones. Their higher end have as high as 16mm. Sportneer seems to make a decent budget option comparable to the mini's 12mm at $130.

Wife immediately tried to buy a Renpho model when I mentioned it. It's sweet, but I told her it needed some research and that she doesn't have to spend every dollar we have as fast as she can.