I welcome since recently I am interested in this topic I am curious about your opinions about the comparison of the ones two in the sum of new detectors how it is obvious so that two detectors have exchangeable tubes but they are also not always exchanged how he is with using or indeed F70 with one's 13khz is more sensitive and more accurate than X705 around standard with 7.5khz tubule when with breaking down or here also to the F70 benefi