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I read here somewhere on the forum that there are several reasons why a pre-unit Triumph Triton is better than a unit.  I have searched everywhere and can't find it.  I am thinking about maybe building one.  The pre-units are getting rather hard to find.  Aside from the desirability of the pre-unit and the fact that they more accurate to the original Tritons,  why is the pre-unit better?  Why would a unit Triton be technically inferior?

Thanks guys.