I hope you arent misinterpreting this as hating or nothing
Turbonetics internals? Maybe the seals and bearings, but what will that do? The ebay fake turbo's also use real garret bearings and seals. I'm talking about the housings themselves crack in those turbos... If you want I can pull a link of a guy who analyzed them.
I am speaking from experience by the way. I had both turbos on my car before, the ebay "t04E" and a turbonetics "to4B" both .63 a/r housing, the turbine wheel on the ebay turbo was just about the same as a spare turbonetics stage 3 turbine I had laying around.... I have a turbonetics stage 1 wheel and housing in mine now and spool time went from 10psi at ~4900 rpm(stage 3) to 11.5psi at 3200rpm(stage 1)
By turbine wheel gap, i'm not talking about between the wheel and the turbine housing, i'm talking about the geometry of the fins to where air can escape between the fins... thats what determines spoolup and maxout. If its more restrictive, it'll top out quicker but spool quicker.
But yeah good luck as I said.
But these are just some pointers, if You wanna throw the t04e do it, some people have success for those, but to me its not worth the savings ya know

For an extra 100-200 bux your entire setup will be exponentially better for what you want to do.