That's odd fyrffytr. The X35 is supposed to run quieter that the old LF coils. Mine ran quiet even when I cranked up TX and Sensitivity. I'm using Version 5.21.
Dan, I picked up the 11" X35 because it should suit my needs 90% of the time. My HF 9" will cover the rest. The X35's 4 to 25 kHz range is perfect for me. Plus the Boost function at 4 kHz got my attention. I found a lot of coppers at 3 kHz with the DFX. I am hoping the Boost will sniff out some extra deep coppers. I also like the fact you can use TX3 at 25 kHz. We shall see. I can't credit this recent Fugio to the X35 as it would have been found with any coil.
So......have you picked up a Deus or considering one ?