8008-CORNER, built by Joel
Copyright 2019 © Troels Gravesen

Thanks so much for the response and designing these excellent speakers!  The Alumen-Z are certainly excellent caps, anything "better" comes down to subtleties as you mentioned.
I've got the speakers in my bedroom setup and I love spinning some records before bed.  Good recordings come off sounding very natural and realistic.  My single ended amps complete the aural picture and sometimes you would think the singer is in the room!  I was able to take the excellent T35C-002 from my Seas A26 build and move them straight to the 8008.  The gain in bass extension and efficiency was exactly what I was looking for.  I had someone contact me about them and he ended up replacing his DIY Audio Note E with them even.