When does IT band release become necessary for femurs?

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Is it related to amount of lengthening? Like, for example, if I lengthen for just 4.5-5.0 cm, can I get away without IT band release?

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What about people who did external femur, i.e. Overdozer and other users who did cross-lateral and exceeded 5 cm?

I'm mostly interested if there are people who lengthened in 4-5 cm range and never did IT band release.

Also, is that procedure expensive if one needs it in the future? How invasive is the surgery?

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If my doctor doesn't perform it, is it okay to cut it after I lengthen my femurs? Maybe after 1-2 years post-op.

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If my doctor doesn't perform it, is it okay to cut the band after I finish the lengthening and consolidation process?

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What about people whose surgeons didn't perform the cut? How do they function after LL?