Here's a letter written to Brooks and their comment fwiw:
BROOKS ENGLAND LTD. | CITY+&+HEAVY+DUTY | B67
Written by Mark Caspar from New Zeland 9/21/2009
COMMENT > Last year I bought B 67 saddle. I can say that it is very firm and hard to break in. Although I am not heavy, I suppose it had to be broken much sooner. So as regards comfort it has not proven very good for me.
REPLY > Did you apply Proofide? Did you adjust it properly? If your problem is that it has not shaped to your anatomy, maybe try to moisturize it and ride on it. It might help to get your shape. Before doing so, do not put Proofide.