BTW: What is crunch, is this another tool I never heard of before ?
Better late than never.
Sorry for the delay on the answer, Crunck is a bruteforce password generator, a good example is the next command line:
crunch 52 52 ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz -t 5KMWmYkn5YWkJnUDG4utD9L1HXQv3DBseqqCGsQXmthcEerbA@@@ -o pks.txt
That command will make bruteforce on the last 3 digits form that privatekey, starting with AAA, ending with zzz, and trying with A-Z, 1-9 and a-z.
That's why i think there is a way to work with Brainflyer and crunch, while crunch generates the new private key, BF verifies it.