Confused?
You say that there is only 10miles on sence the turbo install, yet you hit the det 30-50 times sence the install? If I am reading your last post correctly? Either way that was a quick death for that piston/jug IMHO. You would have seen and felt the tell tail signs previous to doing the turbo, such as the sled killing when ever you tried to put in reverse? Are both pistons/cylionders cooked? What does the head/dome's look like. So so many things that could make it go bad, turbo or not. Bad gas? lean mid range, compression det, injector prob, faulty afr guage/reading, oiling(kink, bubble,wrong setting) ect ect.
My old 08 summitx's motor, ran like a top for 1500miles, not a mark in the pistons/jugs looking at them via the power valves during cleaning/s. Rolled her out of the barn, put in some fresh gas, headed out over the hill, ten miles later got the dreaded wha wha wha wha whoo stop locked up. No idea what happend, but it got the pto piston real bad, looked just like yours does. All I could do was rebuild, and recheck every thing. Got re nic'ed mono from US crome, some fancy after marked pistons (MCB dual rings), put it all back together, double and triple checked all the lines, replaced the sliders/guts in the power valves, new gas, and started adding oil to the tank all the time, and away it went. Put another 1000+ on that motor til I sold it. still had 125psi hot comp in both jugs give or take, and made awsome power after the rebuild.
I would recomend puting the best after market pistons, and reman mono on that you can get/find. "Indy DAN" "Rtek" "slp" "BMP" "PAR" and many others have "kits" for these motors, which is the best would be your choice. They would also be able to offer way more professional insight in how to proceed after the rebuild, as to not have it go down again. Call one or two of them and ask, never hurts to ask....besides that call/s will be the cheapest part of the whole process.....sorry....
What ever the case, you may never know the "cause" for sure, all you can do is make it right from here forward.