A "shoot-out"? That sounds like two fellas with very differing points of view arguing over a topic or two. That's not what occurred in the link you provided, and if you follow the threads on this link:
https://www.ahrps.org/forums/read.php?2,751,751#msg-751
I think you'll see that I have been in great agreement with Bill and the modifications he did. I enjoy the performance we can get from a simple-appearing Classic series detector, and have relied on having one around .... with 'Mr. Bill's' mods, of course. I used to use a modified Classic III SL at the Oregon coastal beaches, as well as a modded IDX Pro, and even put the IDX Pro to-the-test in some of the nastiest salt evironment you can find in this country [size=small](or anywhere)[/size] that is also a very iron mineralized ground environment. I am talking about hunting inland, away from the coast, but working around and in the Great Salt Lake in Utah.
The last visit there I was with a couple of friends, both using their Minelab Explorer II's, and me with my modified IDX Pro. Not only was one of them surprised at how well I did, but in some side-by-side comparisons he was more shocked at how poorly his Explorer II w/10