Hope you can get the probe repaired, and very nice of Gary to try and help out.
I've had an Mi-6 since they were released, the only problem I had it would loose paring with the controller but when it was pared it was very deep.
Lost interest due to it disconnecting from controller, and at the time it seemed gutless on depth when using as a regular pinpointer so I wasn't using it for months.
Then, My other two pinpointers where having issues. Top of the line models, went back to the Mi-6 to use as a regular pinpointer. Was I ever suprised, the Mi-6 Was at least equal on depth maybe even deeper than my two top line pinpointers. Now, the Mi-6 is all I use with all my detectors. It's reliable, deep and rechargeable.
When you get your Mi-6 back from repair, don't get discouraged hang on to it like I did and eventually you'll see it's probably one of the best pinpointers out there.
Use the highest audio setting coupled with vibrate mode, you won't regert it.
Keep us posted with the outcome, good luck!
Paul