ONE vote for Terry's method. The bottom snap-in fastener and a half-dollar-sized piece of sidecover had broken when I pulled it off to remove the battery for the winter. I did as he wrote - used a rotary tool to bevel the edges so a V would form, taped the broken part in place, filled the V with baking soda, and dropped liquid Superglue onto the baking soda. It saturated and solidified the baking soda very rapidly; it was not possible to mix it. It made a nice semi-opaque filler that seems to have made a very good bond. Time will tell how it holds up, but it looks very good -- you can hardly see the crack from the outside of the cover-- and it'll be back in use tomorrow.