True Stereo BBD recommendations/schematics?

[ThePastRecedes]

I'd like to have a got a building a true stereo BBD . I've done some reading about BBD and I think I understand the basic concepts.

Does anybody have a schematic of an analogue delay with stereo in/outs? If not what would make a "true stereo" delay? Would two analogue delays in parallel be sufficient? Or would that just create a ping pong delay?

I've seen some people post about using multi-tap BBDs but I'd personally like to adapt  a circuit to use readily available or current production chips.

[Fender3D]

I'd like to have a got a building a true stereo BBD ...
... what would make a "true stereo" delay?

Natural echo or delay, I mean the echo you can get in real life such as when you go mountains or "echo valleys", is mono, since you will always hear it at the same time with both your ears; it will be mono even if you have a friend with you and you both scream at the valley at the same time (stereo program, 2 distinct sounds, one reflection).

This kind of echo will need just one delay line.

If you need separate reflection(s) for each channel of the stereo program, then you'll need 2 delay lines, one for each channel. This might give you a sort of cacophonic effect because the different delays will create a confusing halo around the 2 signals. It might be interesting though, expecially if the stereo program comes from a stereo chorus or flanger or whatever stereo processing effect.

If you need to apply your delay to a stereo program, such as a stereo recording, the best (artificial) effect is achieved when the left channel reflections go (mostly) to the right channel and viceversa.

These 2 last options will need both 2 delay lines, but a different connection at the mixing stage on output.