I'm happy to have encountered this thread, it serves as a reminder to try my Acutex cartridges again (MCR 320 STR III, and 415 STR) again.
Other aspects in the audio chain has taken precedence over the Acutex issue, but recent improvements in the system has revealed how much better my analog front end is these days, so it's about time to put the Acutex carts back in again.
I've been enjoying an AT ART-9, incredible cartridge.
My salutations to you all,
Dan