Hi Bjorn,
I have a working version of this now which you can download from my site at https://microbion.co.uk/files/rounditr2024.zip
It's PC-only at the moment and requires C4D R2024. Try this and see if it does what you need. There's some basic documentation included which I'll tidy up for the final version.
There doesn't seem to be a DM facility here so we'd better take any further discussion to email. You can get hold of through the contact page on my site (link is in the PDF in the zip file). Do let me know what you think.
Cheers,
Steve