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Found a way to use the standard plasma component.
After contact (probe-down) I let the contact pulse width be say 5 ms, just long enough for it to register contact.
Always 5 ms and I can compensate for the short distance traveled with the Ohmic Offset setting.
Only downside is the pulse is too short for the Ohmic led to blink.

Checked the ECT60 but I don't see an opening. It has the 0x6077 actual torque pdo but that is always zero.
Homing could be possible. But to switch to homing and lose coordinates and fix that.
I don't think it's currently working badly enough for me to want to put in the time needed.

Bit of an update:

Images have been created for bookworm, the only issue being:
Have to include a /etc/profile.d/linuxcnc-force-realtime.sh script to set up realtime as discussed above.

This one is the breaker for any real testing, booting to first login is to the terminal, has to be manually set for booting to desktop, then rebooted, after that everything is ok. Seeking answers via github so stay tuned.
Goal is for RPi users to feel more at home, except from the desktop change from LXDE to XFCE.
On the creators side, no having to build kernels, kernels come form the rpi repo.