Talk:Piero's Workshop/@comment-65.33.72.14-20130821165707/@comment-16533050-20151023023407

The anon could have meant that he/she found blueprints of some type partway through a mission - such as that found at Griff's Curio Shop.

Rather than continue on to the main objective, the anon may have wanted to upgrade immediately. Since High Overseer Campbell has quite a few places you can visit, the anon may have assumed that you could go back to Piero's workshop and get the upgrades done right away instead of waiting until after the mission.