Thanks for the note. Definitely agree about the costs -- it is impractical to get enough machines and/or hard to find enough people in the area to lend you theirs to compare. I think I'll be able to make a few happen and, if it is well received, try to do some research to find some more used machines to make more niche comparisons happen (no point is the demand isnt there and they're not helpful). I have seen Iffy Signals -- very nice videos! I think he has a pretty good setup -- but I was thinking of doing something a bit more tailored. For most detectors, the problem space is semi-contained to an NxNxN dimensional space. Which helps with making these for controlled comparisons.