I have a friend who has the most gorgeous bull terrier in all ways - not just skin deep.
Anyway this dog has had more than her fair share of accidents - including a crushed paw - which hasn't healed straight. She still won shows. And even won shows after she was desexed.
There are best neuter classes now, so I'm not sure if limted register precludes entering those or not. Something to think about. I hate entering things where the winners are chosen entirely subjectively by the one judge. I prefer when there is some element of undeniable skill.