I watched this Veritassium video explaining compliant mechanics, and I highly recommend it:
"Why Machines That Bend Are Better"
I'll put a link to my Z-19 in here, which I designed long before I had ever heard of compliant mechanics.
The only use of compliance in the Z-10 is that I avoided having to print a separate giill for the top fan by making it part of the whole structure and elastically closing onto the fan when you put the screws. I have a more serious plan for use of compliance with my Z-X project, but it's secret ;-)