Before you attempt this cache you will need to have found "Square Peg in a Square Hole" #traditional inside which you will find a geotool and a guide to cracking the combination,four numbers are required three of which you will have already seen if you have read the description for the traditional carefully, they are to be used sequentially and by calling them XYZ or ZYX, use the guide to find the fourth.There are four starting points and any systematic approach will get the answer, all you will need that is not provided is PATIENCE.
To sign the log you will have to crack the combination then use the self assembly geotool to remove the peg the cache will then open to reveal the log.
Once you have finished please replace everything as you found it (remember to spin the numbers when you close the lock or better still reset to four zero's)
BYOP and tweezers