To 'lose' all of them several times is unforgivable.
'Lose' is being used loosely here. It's just that every time we cover the pile marks (nails) on the strip foundations the piles are lost AGAIN. And there are three layers of EPS, the first of which contains the Perinsul block. And the position of those is important. There are about 50 blocks to place accurately.
Why does this matter?
Well for one thing , it's time wasting. For another I'm sure there should be an elegantly simple answer to this problem. Here's Dan of Cowley Construction, patiently marking out yet again.
Got an answer for this one? Is there a simple answer? The closest I have come to it is to laminate the plan. At least that saves paper.