Its own dressing room? Could it be detached and everything?

LH, the political crowd would have killed Custer. He was vain and had an opinion of himself far greater than he was (read his books and those of his wife). He was basically a nasty, vain, little martinet -- in his court-martial that came out. He overstepped the bounds and offended Sheridan, his superior. No, he couldn't have been made President; if he had he would have been the first actor-president instead of Reagan.

Brave? Yes, to the point of fool-hardiness, and amply demonstrated in his Civil War career.

To send your reloads off to scout a different area, to ignore the advice of your scouts -- IF he had survived his men he would have been court-martialed and drummed out of the service in disgrace. His vanity would have been, and was, his downfall and he got his "gray horse troops" killed as well.

Like Douglas MacArthur, Custer was too vain and proud and his bubris brought him down.