I think my saddle is too low.

It is about 1.5 cm lower than the suggested height from my frame-builder, who did a very thorough set of measurements. I also have that sort of weak feeling when climbing hills seated, so I tend to stand up more often than I should have to.

However, if I raise it, it hurts on the left side. (According to the same frame builder's measurements, my right leg is slightly longer than the left, and he had taken this into account already for the recommended height). I never noticed it until I was measured, so it isn't extreme. But I think this asymmetry is part of the problem.

Anyway, I have kept it "too low" so that it doesn't hurt. It is more like my whole leg hurts, not just where I sit.

I've been using an otherwise very comfortable Brooks B17 for several years.

Is there anything else I should try? Are there any saddles more forgiving of leg asymmetry? I've also heard some people suggest rotating the saddle slightly, so the nose points a degree or two off center (which way would be better?)

Oh, I should mention I tried a shoe cleat shim, but it was such a disaster I had to take it out mid-ride.