I picked up a used NEL Storm 5 pin off fleebay that turned out to be junk I guess, who knows? Can't turn the Silver umax over sensitivity of 5 without unit oscillating. Put it on the Outlaw and cant quite get it to ground balance. It's a little negative and as you approach null, the machine goes silent, nothing at all. With all metal preset at full, there is no way to turn it down to 50%. Contacted NEL directly, they said "contact dealer". I contacted dealer and they tried to help, took serial number and said it was 3 years old, forget it. Basically if it's under warranty, they'll send you a new one, but when two year warranty runs out, tough luck. They offered to sell me a new one at a discount which I appreciated, but ain't no way I'm pouring more money into NEL. I made a mistake, but won't risk following it up with another one. I've used many NEL coils over the years on my Fishers and never had a problem, but the way I was treated on my first attempt at a repair, forget it. I'll never buy another foreign coil again.
I broke the connector off my 11x8 RSD coil from Tesoro and they fixed it no charge!
ymmv