How much time until consolidation and being able to walk without any help?

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Im looking to do a conservative amount of lengthening, about 5 cm in femur and 4 cm in tibias (about 1 year apart). It's possible all the procedure can take about 4 months for each one as an upper limit? i mean, time since the first operation until im able to walk again not using any kind of crutches or a walker.
It seems somewhat not possible, but im willing even to lower the amount to 4.5 and 3.5 respectively if i can reach that time limit. I dont want to loose a year in this and just do it as a summer procedure. 7 cm in total its more than enough for me, i'm 158 cm tall and reaching 165 cm tall considering i have money (or at least my dad have money and i'm going to inherit a good business) and i have a very good looking face, sounds like enough, i can mimic anyone being 167 or 168 cm tall with a pair of shoes that allow me that.

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I hope. What do you think about externals?

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i hope it to be faster with the ingestion of vitamins and a good physiotherapy