I lengthened my femurs by 7cm (159->166cm) and the lengthening process went pretty smoothly. Now I am 2 months into consolidation with very poor callus formation. I realized my arms look short now (163cm wingspan) but I also want to do tibia lengthening in the future because my femur:tibia ratio is distorted now. I regret lengthening 7cm and wish I had stopped at 5 or 6, I would have better proportions and maybe better bone healing.