I think what he's telling us, is he has built it to very tight fitting specifications and made several mods to it I assume. High HP engines tend to not last as long as mild mannered engines. which is dramatically affecting the life of the piston, as well as other components probably. I think he mentioned you could hear it slapping when at idle from the small tolerances.  At least that's what I'm understanding. It must make some incredible HP to wear that fast.

The pistons on the high HP engines get loose because the skirts collapse.  The skirts on the pistons still look new on most of the pistons that are real loose.  The modifications that we perform on the piston does noting to improve the life.  In fact the modifications reduce piston life but help increase the power.  There is nothing that can be done to improve the piston life other than leaving the Zilla at home in the garage.  Longer connecting rods do not seem to reduce the time it takes for the piston to collapse.  We just need a stronger piston.