retrofitting a Proxon for coin die milling

See if you can add isolcpus=3 to your kernel boot file. I have done it on a pi but can't remember how
It should improve latency.

As rodw said, try to add isolcpus=3 or even isolcpus=2,3 in your /boot/firmware/cmdline.txt

Also, I did some tests with Remora over ethernet on a PI400 and you should follow rodw's video to adjust the ethernet connection to your mesa card.

Thanks for all the hints.
And because I hate to abandon discussions out of nowhere, let me just say our family was hit with quite a tragedy and I can't say when there will be time and mental energy to get back to this project.

greetings mclien