I am still sort of beset by extreme nervousness about adjusting mechanical things that I depend on for the security of life and limb an'nat, but I very conscientiously made sure that they seemed not too tight (after the first adjustment they were, and I could hear the wheel scraping against the allegedly "open" brake pad) and not too loose and that the bolts were as securely tightened as I could manage.
Anyway they're holding up so far. I think ultimately I'm safer than I was yesterday when my back brake was getting very wimpy.