Sometimes while doing research on a model I have "Inadvertently" left the instruction sheet's in the book I was reading
Even as I type this post there are 4 instruction sheet's in my U-Boat research book !
Breath deep..... exhale..... and say to yourself: If I were an instruction sheet, where would I be?
( I have also found instruction sheets in the fridge ! Why? Because they were "stuck" to the bottom of the pie I was eating the night before !)