First draft is effective! But not perfect. I can force the lever... but it takes some effort. I have some ideas to improve it. I'm thinking I'll use the slot to keep it in place. Shown with a chopstick where the pin will go. Side note, some of these drafts I print with so little infill they almost crumble in my hands. But they print quick and I don't waste filament on drafts that don't work.