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Siegetek vs SHS... I use both. SHS is "good enough" for most applications, Siegetek is very good, but you really won't benefit from having a set unless you've already optimized every other part of your gearbox. And you have to be good at shimming, there is no point in spending that much money on a gear set and shimming it in poorly. Once you start to extremely high stress builds, Siegeteks are the ONLY choice. I've seen a broken 14:1 step gear before, it was missing two teeth. That was caused by grossly negligent installation by several "techs" and a year or so of running a M170 in a DSG over 50 RPS.
Lonex pistons are the best general purpose pistons on the market. The racks are the hardest I've seen, and the material is dense but flexible. I've never seen one fail from anything except pre-engagement due to jams. Even then the steel teeth and pickup tooth are fine.
The two wire method causing failures is probably just user error, the signal wires shorting or something. All the second wire does is it connects to the positive lead inside the FET.
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