Festool worktop jig 12.7mm bit?

[Kealevans]

I'm about to use the jig tomorrow for the first time unsure if the walls are sqaure anyone used the jig with a 12.7mm bit and 30mm guide bush? I know they say to use the 14mm but don't have time to get one on such short notice.

 

[GarryMartin]

This has been discussed before and AFAIK, the 12.7mm cutter works too. See the below thread for details;
http://festoolownersgroup.com/festool-tools-accessories/worktop-jig/