My first Brooks was the Pro combined with a Campy Record seat post & I had the Campy saddle wrench too. The Brooks Pro had some sway...I tried to use the Campy wrench but there was near-zero clearance between the saddle leather & the tension nut; plus the tension nut was somewhat recessed above so that merely reaching the nut w/the wrench would have displaced the leather, actually turning the wrench would have really risked (in my estimation) stretching out the leather esp since it had little flexibility near the nose. Was a moot point since I discovered that the bike shop owner had sold me a used saddle as new. BTW he was the same guy that famous Watergate reporter Carl Bernstein plugged in his book! (Carl was a cyclist & had his bike stolen on the night of the Watergate indictments.) Bike shop owner later had his store closed due to delinquent property taxes.

So IMHO the Brooks tension nut design is dumb, VO saddles have a hex-nut. Brooks owners seem to manage tightening so I guess that's not a big issue but still. Also Brooks Pro doesn't have loops for a saddle bag.