Thanks, its the enhancement slots that are missing on the belts and bracers, so 150 it is for me.
As far as bolster goes, the stat i swapped out for expertise was accuracy. Accuracy doesn't bolster either and i don't really have a need yet for accuracy with my build. Will need to add some once I hit 50 but thats not a problem with 50 gear. I bolster on bolsterable (haha new word) stats exactly the same before and after expertise.