The conditions couldn't have been much worse. Inside a room full of metal, lights on. Had the edge sitting on top of a heavy metal bookcase with a Formica top. The coil hanging over the edge about 2 feet. Had a hard time getting it to settle down at all.
Got a couple of tests in with the sensitivity at 7 before it started going nuts and playing a tune. All tests were done by setting the ground balance using an iron ferrite core. These use to come with the early Whites GEB machines. Received the single tone ground balance OK signal. No discrimination was dialed in. The discrimination was at a -36 so all targets would be heard.
1.22gm thin 14k band. Strong repeatable signal at 5". Solid repeatable signal at 6", and a 7" max signal that you would investigate.
2.96gm 14k band. Strong repeatable signal at 6". Solid repeatable signal at 7", and an 7.5-8" max signal that you would investigate.
7.98gm man's ring with black onyx stone. Strong repeatable signal at 7". Solid repeatable signal at 8", and an 8.5-9" max signal that you would investigate.
For some reason, I had to drop the sensitivity down to 6 because of instability. Re-ground balanced using the above procedure.
5.25gm 14k white gold band. Strong repeatable signal at 5.5". Solid repeatable signal at 6-6.5", and a 7" max signal that you would investigate.
2.05gm 18k thin band with 7 small diamonds. Part of a two piece set. I didn't find the big piece.

Strong repeatable signal at 5". Solid repeatable signal at 5.5", and a 6" max signal that you would investigate. The 18k didn't come in as strong because of the purity of the gold.
8.47gm 14k white gold man's ring with 2 1/3 caret diamonds flanked by 6 smaller diamonds. Strong repeatable signal at 5.5". Solid repeatable signal at 6", and a 7" max signal that you would investigate.
A newer nickel gave a strong repeatable signal at 6", a solid repeatable signal at 7", and an 8" max signal that you would investigate.
I really didn't get a chance to test anything else. I will try that tomorrow. I might be able to run the sensitivity a bit higher during the day when the heat isn't running, and all the lights aren't on. In just a quick check, it seemed as though there was about an inch of difference between each sensitivity setting. Can't say for sure though without more testing.
I really like the small 1200 series box that is used on both the Id-Excel, and the Id-Edge. The Id-Edge has the same mount as a 1236-X2 for the hip-mount capability. That will come in handy with either a larger coil, if, and when, one comes available, and I can see this machine adapting itself for water hunting. (Wading, of course)
Well, I hope this helps a little. I wouldn't jump to any conclusions, or opinions just yet without getting this thing out into the field. The weather, and my work, looks like they might cooperate on Friday. I'll keep everyone posted with any new results.
Let me know if there is anything else anyone wants me to try over the next couple of days.
OldeTymer