Guidance chips:

The last part there "(or a <kaboom> result if your primary weapon value is three or higher)."
This does not trigger if you are firing ordnance at range 1 and your primary is 2 as you have to perform the primary attack to get the addition attack die yeah? Had a disagreement with another guy about this yesterday and I'm positive I am reading it correctly in that your attack value must be 3 without a range bonus. For example; you could Jan Ors pilot/expose to raise your printed value to a three and achieve it that way but not via range bonus.
EDIT: Disregard mention of Jan Ors in the above example. I did not remember the wording as well as I thought I did and the phrasing does not raise your primary attack value.
Edited by EbongHawk