This video covers fabrication and assembly of the Thrifty Elevator for FIRST Robotics.
https://www.thethriftybot.com/collections/thrifty-elevator
Cleco rivets: https://www.amazon.com/16-Cleco-Fasteners-Pliers-K1S50-3/dp/B06WD3J75S/
3D printed tube cutting jig: https://cad.onshape.com/documents/7d1e18e6d0a42b928f812a0f/w/2e1468a1d59020601601261e/e/4d01b3095fb21368aaa50721?configuration=ToleranceWidth%3D1.2700000000000002E-4%2Bmeter&renderMode=0&uiState=677a1bd85d741677543c6365