Reuben appears to have solved the problem of installing clamp rings during the upgrade process judging by these speakers:

Clamp rings on DSP8000SEs

A very good price too. Good for him.

Streaming: Roon, NUC, QNAP869 NAS
2ch system: dCS Vivaldi, Audionet Stern, Audionet Heisenberg, Magico Q1
Retro system: 101/104/105, Red Rose Spirit