ATC6 after camera boot: enable chunks

Excuse me, I’m not really understanding the concrete procedure, you’re describing here. Do you have a minimal working example in CVB++?
Especially that:

(that is clearly not a way to go)

Did you try using the discovery interface and enableing “AttachChunk” node? As already stated here: https://forum.commonvisionblox.com/t/3rd-stack-gentl-no-vin-how-to-get-timestamp/1896/10 or https://forum.commonvisionblox.com/t/using-chunk-data-in-cvb/1895/3

I’m not sure whether you’re helped with that, but there exists a way of reloading user sets for the nodemap configuration. Also not sure whether ATC6 supports that. With that feature, you can save current config, and set it for device boot time.