this was a very old easel with broken Top limiter
You can copy and edit for your needs.
https://cad.onshape.com/documents/f6271f1518e4e5d6c58f9ca5/w/03204886a0ef18205712db4f/e/419a494443a30929908a45ca
Rafts:
No
Supports:
Resolution:
200
Infill:
20