Blind caps on RCA and other sockets useful with CH P? Furutech clear lines?

[engadin]

There are many reports on Chord Groundarays and CAD usb control plugged into CH P gear being helpful.
I own a few and like what they do.
Did you try or maybe even compare with Furutech clear line RCA, XLR, USB, etc?
Do you have any experience with blind caps on RCA, BNC whatever plugs being helpful for better sound with CH P?

Thx for your input & cheers
Ulrich