Assuming it still reads reliably, does the position of the FX chrono when mounted on the barrel/moderator (say between 0"- 5" back), have any discernible impact on accuracy relative to shooting with it off? With it on, is it better (from a harmonics/accuracy perspective; for those who know the importance of harmonics in real life - which is not me) to have the weight at the end of the barrel or at the farthest back position where it will still give reliable readings? Thx.