I discovered that on my post this morning that when I calculated the current necessary to charge the additional capacitance of shielded cable I was talking picoFarads but calculating with nanoFarads and so I was off a little. Ok, more than a little. More like one thousand. But that's a lot less than the billions or trillions the gummint uses. Sorry!

But the main reason for not using the shielded wire is that it is doesn't have a high-enough voltage-breakdown rating. The resonant voltage in the LSE system is almost double the pulse voltage. If you get a dielectric breakdown in the cable causing it to arc, besides giving intermittent spark output, the output transistor could soon break down also, shutting down two cylinders. The breakdown rating of RG-400 is 1900V, more than enough.
If you decide to use or are using this shielded wire in your LSE system, make sure that the person recommending this wire to you and has sold it to you will warranty that if the wire breaks down and causes the EI to fail, he will pay for its repair! If you are using it and it hasn't caused a problem, at least that you know of, well, good luck! Keep watch for occasional roughness.
Never change anything to do with an aircraft or its equipment unless you have the blessing of the manufacturer. If not, you are now in the experimental world yourself, and you alone are responsible for any failure of your equipment or life.
BTW, have any of you that reported that you that had failures with your LSE and were using this shielded wire but you didn't tell Klaus about it ? For shame! 'Fess up, guys!
