Honestly, I haven't heard of too many failing, but I have heard of it. Ideally a custom two piece is the way to go... it'll be a LOT lighter than stock and as the length of each segment is less than half that of the one piece the critical speed is MUCH higher. If you've got a competent shop in your area who can build you one I'd go two piece. Like I said, I'm running a one piece, but if I were to do it over again, I'd get a stock two piece rebuilt with lighter steel and a new or retrofitted carrier bearing... IIRC, the stocker is very thick and filled with rubber or some similar dampening material.
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