I realised I'd have to check almost 700+ of your posts to find the image too
Do you by any chance have a copy you could upload here again?
Just thinking back on it, I'd mention rough handling when there is more damage than required (extensive or intense spot bruising, holes that are really large, or holes that don't heal up at high-speed [comparatively to normal healing rates].)
So, from my perspective, the handling is not rough if the results have surgical precision and heal very quickly; I mean, this tech is advanced, and the handler would really have to botch the job, be highly unskilled, or purposely injure to produce poor results.
There's another consideration, we don't know what that settings wheel does. It might adjust the scan type, and perhaps the degree of depth and size. It'll be presets though, and from the diagram around 16 and well below 30. If it is a 4 parameter device 4x4 for 16 settings makes sense (size, depth, type, output energy and I'm only assuming 2 variants for each).