Kal el, the height gain from just correction will be negligible. But they cut the bone and attach frames for correction, so my thinking is we might as well have a few cm added during the process. I've been in touch with Barinov's assistant and she said simultaneous correction and lengthening by external method can be done, for the same price as just lengthening.

If we add 4 cm, there will probably be an extra 0.5cm with the straightening, and complications such as ballerina are unlikely with this amount of lengthening. That would probably require a 7 month stay in Russia (I'd rather go full external to avoid the nail, as one of the reasons for this is to prevent knee pain)