I like the clean lines of this set up . To much “ fluff “ like fabric or plastic wrap or for me a well intended pillow case can lead to certain death for our littlest babies ...
Keep it simple , keep them safe .
Thanks for the great pictures , I’m a visual learner and I learned a lot .
Can't wait to see how the adjustable legs work! If you still don't have a solid method, try screwing the nuts on a long bolt or piece of all-thread, and then solder/braze the nuts (with washers if it helps) to the wire mesh, that way the thread will raise and lower as you spin it. Just food for thought! Let me know when you update and i will re-rate!