I had a pair of HLSC's at one point (sold 'em in the yard). Now, they distorted on me 3 times before I sent them to Chris Church to test. He suggested they get modded (4.7k mod) and once they came back they recorded anything I threw at them (and I tape rock/metal).
They are definitely a great set of mics. I only sold them on because I needed the money and had too many sets of mics at the time.
Also, as far as I'm aware, the mod will NOT change the sound of the mics, it just lowers the sensitivity of them.