I'm doing a vaulters game and I'm trying to do their main questline, but I'm given an objective requiring a hero with level 3 Mechanical Exhibitionist and I haven't spec'd out my hero even remotely close to that direction of the tree.  It wouldn't be so bad but this game is set to fast speed and im now getting this on turn 129, so im kinda blindsided here since i didn't know it would be needed lol.  Any help to answer this, or any workaround to at least help with the quest would be much appreciated.  Thanks!

Sorry, but heroes can't forget what they've learned in this game.

haha thanks!  Yeah, that makes sense, I was mostly concened for the sake of the quest-line.  I did find out I can continue to play after the turns limit, so it looks like I can just stick it out to complete that quest-line without having to start a new game.