Review on 💡 Wago 221 413 LEVER NUTS Conductor Connectors: Secure and Efficient Electrical Connections by Vinay Mickel

They are easy to make by hand. I just connected my addon to them. I only used them on the #12 wire to help get the wires back into the box. My only complaint is that the levers sometimes open up a bit when hit with another wire. An experienced electrician will not use them all the time. Most because of the cost, but great for DIYers.