Hey,
Excluding Tesoro, I have used NEL coils on three other detectors made by other manufacturers. They're PRICEY coils, but have quality and performance that impresses me.
There have been some complaints about the positioning of the cable connector on the coil. It was too close to where the nut & bolt attaches the coil to the lower stem on the detector.
What has NEL done about that? They moved it to a new postioin on the new Grey Color coils.
Let me say this.....I like how quickly they modified the coils per the complaints they received, I like the differing sizes they offer, and I like the performance SO FAR on the detectors I have used them on.
At least they're OUT THERE for those who want them.
J in FL