Guess we're talkin about "nickels" & "silver" but here's my "2 ZINCS" worth!-----When the Etrac first came out, (thru my tests) I immediately seen the need to edit out that upper right horizontal "bar" on the Etrac pre-set coin pattern as it can DEFINITELY affect large silver readings (in some cases).----I posted on it as to that effect & was just as immediately ridiculed by a certain individual as posting "hogwash".----Well, we all know that edit is needed/ true now, don't we?----As far as I'm concerned, that whole pre-set coin program needs to be modified--or better yet, learn the machine & build your own program & settings (to get those DEEP/DIFFICULT silver/copper hits in iron).---Another thing is--that ferrous line needs to be dropped down (opened up) to the 27 level as less than that is going to effect (some) of your deep readings (& in iron).----Does your friends know (or are aware of) this Randy (Hombre)?----Not trying to fuss with you, you are my friend & I'm just trying to make a meaningful post here. You are right in that the IDX Pro (with Mr. Bill mods) is a VERY GOOD machine in iron (especially with the 5.3 Bullseye coil on board).------BUT, I can also tell you, I have in-field tested these 2 machines on an actual hunt in an iron infested site & with flagged targets & the IDX Pro WOULD NOT read on the targets (old coins) that the Etrac hits in the iron.---It's just that the Etrac has to be set up right (that goes for the IDX also).----And yes, I have dug PLENTY of silver (& copper) coins in holes containing multi-nails---including a Morgan dollar at an honest 12"!---Can the IDX do that??----Dunno about your nickels--I don't hunt 'em.---In fact I never have seen the Explorers/Etrac as great mid-range hunters (some may argue this)----BUT silver/copper--(even in iron)---"look out Nellie"--they're MONSTERS!!-----Truth is, for silver hunting & at this point in time, there's just nothing in the world like 'em----BAR NONE!!-----------Del