My proportions for tibia and femur lengthening

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Hello everyone. There are my proportions for +5 cm for tibia, +5 cm for femur and both together +10 cm. I think for + 10 cm my proportions looks normal and not bad. my question is would it be a disproportional if I lengthen 6 or 7 cm for femurs and 6 cm for tibias?

this is my picture here on google drive  https://drive.google.com/drive/folders/1xuVIdL4FB6-Ex3F0Nm9azPfHGirfqE2Q?usp=sharing

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I want 6 cm for each one, 6 cm for tibias and 6 cm for femurs

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Yeah you are right but my problem is femurs, It looks to long when I sit even if I lengthen 4 cm, fot tibias 6 cm looks normal and more beautiful then my current tibias