Ah! for work holding.
I like it!
I tried to do something similar for dovetails when working on my new baseboard ( Design for a new 1000mm baseboard - #15 by EmilianoMolina ) but I ended up giving up on it. Got caught up on the details and it was taking too long.
I am looking forward to seeing how you do it and how you end up using it.
Nice setup! thank you for sharing it.