I don't have a horse in this race & have heard nothing but good about Tommy in the past.
What I will offer is my opinion on what went wrong on this build. The valve train geomitry was not set-up properly from the get go as the rockers show the retainers were hitting hard. This caused instability and the lifters were hammering, not gliding on the lobes so that eventually hammered through the case hardening of the cam. The metal debris is very hard material & then caused wear throughout the rotating assy. It appears it was all as simple as checking installed spring hieght, wipe pattern, bind, and rocker to retainer clearance & there would have most likely been no issue. He may have had someone else do the setup & trusted them. Either way, this is the result of improper valve train geometry.
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