Get a bike fit NOW so that winter training (lighter and easer) gives the body time to adjust to the new fit—before the muscles have grown “summer strong” and thus can exert more force on the joints. Even small changes cause different forces on joints, so adaptation over time is wise.
Ditto for anyone considering a custom bike frame.
I’m really happy with where I stand on my fit. Although my twisted hips took time to untwist (because of 12,000 miles with a skewed crank offset prior to the 3DBikeFit), things are working great now, and I’m really glad to have made the change. My skewed pre-fit condition was atypical, and at this point I can ride at any power level, any slope (climb) and not have any pain or back fatigue, etc—excellent results.
See also Saddle Position and Tilt for Power and Comfort and Strong Again. I’m really pleased with how well I can put out power now that I can rotate my pelvis: I can almost lie flat on the back when I wish (without arcing my back so the gluteus stays engaged), very helpful into the wind.