Correct me if I am wrong but I understand that the Tesoro u-Max series did not come out till after the Shadow X-2.
The low noise electronic components that made the X-2 perform so well were adopted by Tesoro after Troy proved his idea was correct.
The more expensive low noise components allowed the Shadow X-2 to have more sensitivity, greater depth, better target response, with less ground chatter.
Troy figured this out and contracted Tesoro to make the Shadow X-2 (based on an existing Tesoro model) to HIS specs.
The Shadow X-2 worked so well Tesoro took that idea and come out with a complete new line called u-MAX.
I don't know about Troy, but I would not have been too happy about that but then I don't know the inside information or what kinda deals were made.
I do know that Troy is a smart fella who had a great idea and was responsible for one of the big improvements in metal detector performance.
Shadow X-2, X-3, and X-5 detectors are no longer available as new units but used ones are still around and usually demand a good price.
Here is a good ides for some enterprising fella to pursue ... make a lexan plasic case so that the electroincs from a Tesoro detector can be removed from its housing and placed inside it.
A waterproof coil connector would be mounted on on end with a pigtail that plugged into the detector coil plug.
The headphone jack could be done the same way with a short pigtail to plug into the audio jack.
If the housing was large enough you could put just about any detector board in there.
