Files in this archive:

sinecore.gbl		bottom layer gerber file
sinecore.gko		keep out layer (ie board border) gerber
sinecore.gtl		top layer gerber file
sinecore.gbs		bottom layer solder mask
sinecore.gts		top layer solder mask
sinecore.gto		top layer silkscreen
sinecore.dri		NC Drill report file
sinecore.txt		Excellon drill file
read_me.txt		This file

Board comments:
there is no bottom overlay (.gbo).

