Originally Posted by
furballi
It's a leather saddle, so it will tend to conform to your unique body geometry. A B17 can sag in just 200 miles. I always lace my Brooks to maintain a uniform structure. Search for a thread with Brooks lacing.
Posting a few pictures may help with the analysis.
Yes, it looks like going medieval with butchering & lacing is the next step to get a wider version of the Swallow. Would actually buy a Swallow if they weren't so pricey. I've looked at the saddle & can't eyeball any asymmetry so I'm not photos would show much in that way.