by J_Hodgie, published
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The 3mm filament was very loose in the clamp arm holes, so I super glued little pieces in.
Then as you have found, the lid when fully open allows the clamp arms to fall out through the notch where they are inserted.
I added a dab of hot glue to where they are inserted then placed all the clamp arms in the slots in the locked position, then put the gear top part of the lid on and presto
Now you can open and close it all you want with no falling out clamp arms.
It is a little tricky to put together this way, but much better in the end.
On the knob part on the end of the axle you should see a oval shape(circle with the sides cut off), this matches the shape in the lid part. When they are inserted and the knob is rotated, they should catch, which stops it from falling apart. There are 2 possible orientations that the knob will stay latched in through the full movement of the lid(assuming it printed correctly).
Also, if you don't have 3mm filament, some M3 screws should be able to replace it, just put them in after the the lid is assembled.
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To clean up the parts start by taking a bit of 3mm filament and run it along the grooves in the knob. If it sticks at any point, take a knife and widen the slot. The next clearance to check if take the arms and run them along the slots in the lid.
Next, insert a bit of 3mm filament into the holes in each of the clamp arms and trim it to be about 4mm from the surface.
Now take the knob and lid pieces and line up the axle bit on the knob with the hole in the center of the lid on the side with the slots. Turn it clockwise until the end of the slots in the knob line up with the slots in the lid.
Take the clamp arms you made earlier and push them into the slots. The 3mm filament should fit in the knob slots.
When you put the lid on the base there are bumps in the lid that line up with holes in the base, they should fall into place fairly easily. To lock the lid in place turn the knob clockwise until it stops.
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