File explanations:

Numerically Controlled Drill files:
---------------------------------------------
PANDORA_R6D.L81	-  Drills that go through entire board
PANDORA_R6D.L87 -  Laser drills from layer 8 to layer 7
PANDORA_R6D.L86 -  Laser drills (stacked vias) from layer 8 to layer 6

PCB design files
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PANDORA_R6D.BOARD - Board outline, dimensions
PANDORA_R6D.DRILL81 - Gerber representation of drill locations with alphabetical references, layers 8-1
PANDORA_R6D.DRILL87 - Gerber representation of drill locations with alphabetical references, layers 8-7
PANDORA_R6D.DRILL86 - Gerber representation of drill locations with alphabetical references, layers 8-6
PANDORA_R6D.MESSAGES - Stackup, instructions, impedance control and manufacturing details



Stackup
-------------------------------
PANDORA_R6D.SILK_TOP
PANDORA_R6D.MASK_TOP
PANDORA_R6D.LYR1_TOP
PANDORA_R6D.LYR2_PWR1
PANDORA_R6D.LYR3_SIG
PANDORA_R6D.LYR4_PWR2
PANDORA_R6D.LYR5_GND
PANDORA_R6D.LYR6_SIG
PANDORA_R6D.LYR7_SIG
PANDORA_R6D.LYR8_SIG
PANDORA_R6D.MASK_BOT
PANDORA_R6D.SILK_BOT

Other
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PANDORA_R6D.STENC_TOP - Stencil file for top of board
PANDORA_R6D.STENC_BOT - Stencil file for bottom of board