no i am not using 4e6s. infact my cable is slightly smaller than 4e6s.
4e6s is 24awg. mine is 25awg.
and it's imported cable. i purposely ordered same colour as 4e6s and 2b2at. as previously there's some ppl copy my design too.

recable with 4e6s and 2b2at has too much treble for ksc75 which is originally bright.
i had tested 11 types of cable in recabling ksc75 including silver plated copper. pure silver cable. yada yada...
and what cable i use and where i ordered it will remain as my trade secret. try to do ur own study then =)
good luck.