Can't find the reference. Someone help please. How much xp cost to purchase extra wound threshold or actions beyond your career max?

All I can find is talents and skills for out of career or beyond career max.

I can't find any references beyond the basics (pg 43-45 of the player's guide) -- after lots of pdf searching. Appears 1 + the number listed in the advances box is the max for any career. So a soldier could only increase his light wound threshold +3 during his career. A student could only increase +1. The wording implies you can only acquire skills and talents outside of the career -- that don't count towards completion (non-career advances).

So the options are:

• general career advances (4 mandatory)
• career advances (up to six)
• non-career advances (only two?)
• characteristic upgrades (special -- replaces career advances)