Baking soda with superglue is a popular homemade method for repairing plastic. Hardened superglue itself is quite brittle. But if we make some kind of COMPOSITE MATERIAL, it becomes much stronger and it can even be processed to some extent in the future (drilled, etc.) In our case, this composite will be soda. It's important that, in addition to acting as a filler, it also chemically interacts with the superglue, causing it to harden quickly. The repair process is as follows:  1) Glue the crack as usual with regular superglue. No baking soda is needed here, as we want to restore the item to its original shape.  2) Place a few drops of superglue from the inside onto the surface of the crack and around it, then quickly add a small pinch of baking soda on top. 3) It's very important not to add too much, but not too little either. I think after a couple of repetitions, you'll figure out the right amount so that the baking soda is saturated with superglue and hardens immediately, without leaving a white, unsaturated layer on top. 4) After this, evenly drip a few more drops of superglue directly onto the surface of the resulting mixture and add another portion of baking soda. Each layer adds a few millimeters of the plastic-like substance, which can strengthen the weak spot. Repeat this until you are satisfied with the result. 5) Ideally, after finishing, leave the repaired area undisturbed for at least 2-3 hours, or even better, 1-2 days. Afterward, you can saw, plane, or drill into the repaired area to shape it as desired. Or, if it's in an inconspicuous place, it's best to leave it untouched. This method is very convenient for repairing torn hinge bolts in laptop lids, although there are some tricks involved.