No, your tibia is already long relative to your femur. If you want to get the best tib:femur ratio, just lengthen your femurs for 5-6 cm and that's it, you don't need to lengthen your tibia at all. Besides, you will look best at 181-182 cm height with 5-6 cm femur lengthening only. No more than 6 cm on femur, otherwise your arms will start to look short relative to your knee.