Yes,with a coil other than the D2 this isnt noticed when in loctrac.With the 6x10 the offset definately has an effect.I tried the 6x10 for coinshooting and prospecting and could get a complete reversal with the offset adjustment (that is,going from an increase in threshold towards the ground, to an increase when lifting the coil away from the ground).I have noticed the difference in autotrac with the D2,as youve stated Jack.Its only the D2 in loctrac that the manual offset seems to have no effect on evening out the threshold.