Ah yes, I remember that for advancement. I must admit that I somewhat cheated in my game with using my higher mind attribute since I didn't do any fighting. The rule about using either one for a mental challenge seemed to apply, even to a laser cutting the door open challenge since it didn't require brute force. But I was able to use the body attribute as a sink for the time I got too much strain. :D At the same time, I chose a tech archetype in a solo game, so figured I'd be stealthing and hacking, not running and gunning and needed all the advantages I could get!