Transparent network can't be reclibrated for different leghth?


Got a pair of reference bricks runs on in wall reference with 20'/23' length.  Ask them to shorten that to 8' but they strongly recommend not to do so as the brick can't be re-calibrated to different length(in this case shorter).  Was wondering if anyone tries to do the same and how did it actually end up affecting the sonic performance?
rogerhifi
Thanks for the link.  It appears that the inductor change with length.  I was told that the inductors were bury in some glue that minimize resonance so to modify the inductors for different length is essentially building a new network hence not cost effective.
@OP, I would take anything Transparent says with a grain of salt.
If it were me, I would sell the cables and buy a set of Audioquest.
Bob