Eric J, Thomas V, Apollo The holes to set pylons and giraffes are drilled on the input side of H1, this includes the HAM2 and HAM3 optical lever transceivers as well as the PR3 transmitter and receiver(giraffe). We also set the dwarf pylons down on the anchor bolts and are currently looking to have viewports placed in before installing more delicate components. The H1 output side is being laid out and drilled today as well.