When I assembled my triple, I found my triple bolts had 6 spacers that were 3.51-3.54 mm thick and 6 spacers that were 2.7-2.8 mm or so (should have written the number down). Check your spacers - if you've got narrower spacers, and 0.8 mm narrower spacing will help your shifting, you may already have a solution.

(The above comes from this thread: TA Cyclotouriste triple assembly question.)