I don't remember any "nested" pins on Turdland. It could be that the pins have been replaced? Dick mentions "pins" at the first rooflet but I remember clipping just a single pin, no nest. There is a second angle pin off-line to the right which protects the lower direct variation (not the upper direct at the final roof, but the lower-down bulge). I did not use this angle pin. And then there is another pin before the last bolt but I had good gear nearby and I skipped it.