40 years of fitting cartridges to a variety of arms, I'm feeling stumped

Sibilance and distortion on the last track.
 
I have had no problem with setting-up numerous Ortofons, 2 Dynavectors, Yamaha MC-1S, Goldring 1042, Sumiko EVOIII BPS/Blackbird, Denon DL-304/DL-301MKII/DL-103R, Nagaoka MP-500/MP300. But this.....this Soundsmith ’The Voice’ - it’s beating me up.

I have tried what seems to be every conventional and unconventional means to getting it just right on the VTF, Overhang, Alignment, Azimuth, VTA and anti-skating. I haven’t given-up. There has to be a way - unless I either have the wrong arms (SME 309 and Audiomods Series 6) or I lose what skills I had in the eye-hand co-ordination dept.

I have read every word of Peter Ledermann’s instructions on the USB key and watched the videos. Still struggling.
I shall persevrere.
Any pearls of wisdom are welcome.