If your leg length from the floor to the pubic bone is 35 inches, most formulas yield about 31 inches. That 31 inches is measured from the center of the bolt that attaches your crank arms to the bottom bracket, on up to the top surface of the saddle near the widest portion of the saddle.
The published "formulas" was designed to obtain maximum power efficiency for a young, athletic Pro rider. It is NOT designed for "Joe Average", not does it factor in "comfort" for your knees or comfort for your crotch. Pros are paid to suffer.
I also have a leg length of about 35 inches. A 31 inch setting forced me to rock a bit on the saddle, and left me with a numb crotch and sore knees. Through "trial and error", I brought my road saddles down to about 29 1/2 inches.
Eddie Borysewicz reviewed some of the original rider's data that led to the "formula". He noticed that for SOME Pro riders, lowering the saddle an inch INCREASED their efficiency. So, the "formula" does not even work for all Pro riders.
For example, Pro rider, Alexi Grewal was most effective at 93% of the height set by the formula. Eddie B. also suggests lowering the saddle a touch under the following conditions:
- rough roads
- cold weather, when wearing heavy clothing
- long daily distances
- sore knees when using the "formula height
So, I would suggest you set your saddle at about 30 inches, and try that for a week or two. As you experiment with different heights, try to change only about 1/4th inch at a time, and give your legs a week or two to get used to the new position.
Eventually, you are likely to find a setting somewhere between 29 1/2 inches and 31 inches that works well for you. Then, set all of your road bikes at the same measurement, to avoid problems switching bikes.