TNSS i know you rate the Impact as a decent separator and fast recovery, have you tried the nail board test? I seen Keith's down the barrel test with the small coil, and i think i read somewhere that the Impact failed the test and came behind the Racer?
I rate a 3d test more, but the nail board test gives another picture as well.
Based on my test and use,,and some head to heads on undisturbed targets,,Impact with small coil provides detecting advantages using both 14 and 20khz.
Detectors such as Xp Deus, Nokat Relic, Makro Racers 1 and 2, Fisher F75s both non DST and DST, White's V3i, Etrac,,CTX, Aka Signum, XS explorer, Nokta CoRe.
Now this don't mean these are bad detectors or anything.
And this doesn't mean some targets wouldn't detected by these that were uaing Impact and small coil.
Some of the targets actually were not only detected with Impact,,but better info to distinguish target's conductivity was gotten.
And yes,,some of the targets were not detectable with Impact using smallest coil,,yet were detected with other detectors wearing stock sized coils.
On some of these targets I changed out coil on Impact from smallest coil to Stock,,and was able to get signals on these targets.
But didn't check all with stock coil.
Impact wearing smallest coil,,and operating in 20khz is top notched in the separation and unmasking dept.
And while getting this great unmasking and separation,,user can get very respectable depths from such a small width coil.
Overall I think it opens up the actual detecting scenario for a one coil,,one detector setup.
This doesn't mean there are not others.
The detector wearing smallest coil that I found to be the hardest to hunt behind uaing Impact and smallest coil was the Nokta Relic detector.
I think that says some thing too about that particular detector.
Hope this helps.
I think with time,,what I have said here in this post,,,will bear itself out from actual reports from users.
Users need time though,,to meld with their detectors.
