i was told by a brooks employee at a factory tour some years back, when I specifically asked about them. For clarity he wasn’t talking about a specific model, nor did I ask about one. It was a general question and the worker said that if you’re heavy enough they can bottom out. Also, you specifically listed the heavy duty models, but conveniently didn’t mention models like the flyer, b66,b67, conquest. Which don’t have the triple rail double-coiled springs. Two very different designs with different weight limits. Also, I didn’t suggest the OP would bottom any brooks saddle out, it was a general statement. If you’re going to counter my statement, great, but at least be fair and balanced. Don’t try to slyly accuse me of false info, while purposely being selective in your counter.