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i think location e is the best for a fixed control a b c are in the line of fire if things start coming apart
d is just bad because it is in the way
that leaves e
digital readout would be good i think getting to know the rpms and how the piece is cutting might be learned better if you have the readout
still thinking about some of the other questions
i think that 2-3000 range is pretty tight and i think that they will have a bit of a battle in that price range but i look forward to seeing their offering