https://www.amazon.com/Weigl-Chamber-Works-Vol-2/dp/B0D9XNMMPD
The recording has just been released, a sequel to the SQ 2 & 4 last year.
Now we have all of his SQs in modern recording, although I remember complaints about the ensemble's intonation.
Quartet #6, you mean. As of this writing the subject appears as #4.
I'll get it, but without high hopes, save that the CPO series continues.
Yes, I made a mistake. Now I corrected the title
By the way, his 3 intermezzi for SQ performed by ARC Ensemble can be streamed on SoundCloud