"you can't do precision work with a sledge hammer."
BWAHAHAHAHA!! I'm gonna steal that one, it's great.
Reminds me of a joke about the opposite affliction. A woman justifying a request for divorce because her extremely well-endowed but skinny-legged, buttless husband is a lousy lover. The punchline being "you can't drive a railroad spike with a tackhammer."
;-)