How much nonsense there is. Don't speculate on things you don't know. If you have a long femur and a short tibia, you will look like an alien if you lengthen your femur. Lengthen the shorter limb, not the longer one. This will make your legs look beautiful. If your tibia and femur are equal let's compare. The femur bone is curved and will not be the same as the one you extended. While it will be 100% in the tibia, it will not be 100% in the femur. Also, no matter what method you do, the femur will be more painful, trust me. It will hurt more because there are more muscle vascular nerves in the femoral region. In addition, your gait will be very impaired and it will take more time for you to walk properly than those with tibias. Cosmetically, the tibia is always better. If your femurs are not short, definitely go to the tibia. Unfortunately, there are no 100% load bearing nails. That's why most of the people who don't want their nails to break do lon. If you're going to lon just do the tibias. If you make a femur, you will regret it. Cosmetically, the inner nail is always better, but there is not much risk between the lon method and these methods. There are many patients with complications such as Precice2-Stryde who have had surgery with their nails, have had a bone infection, have broken the nail from the inside. The risks are almost the same as with the loners. The 0.1% difference isn't that big of a deal. Whatever method you do, your bones will be broken and some things depend on your body.