Yeah it happens to all of us, I got so mad yesterday I had to walk away. Seems my biggest skill is losing stuff.
1). Tamiya P-51- can't finish - rear canopy vanished
2). Tamiya P-47 - can't finish- prop spinner gone
3). Dragon Royal Tiger- loader's hatch vanished- salvaged one from an old Tamiya kit
4). Italeri Steyer Tractor- can't finish- drive sprocket gone missing
Etc, etc, etc.........