+14 cm mockup

Here is my mockup photo +7 cm for tibias, +7 cm for femurs and both +14 cm.
I think 7 cm for femurs is ok but 7 cm for tibias looks too long and 5 cm will be ok.
my current height is 176 cm and wingspan is 178 cm.

Here is mockup photo on google driver link >  https://drive.google.com/file/d/1aJVOmdwlBkHeaM_jrBvao5qSN7c4QCQD/view?usp=drive_link

7 + 7  is overkill in terms of proportions and recovery. Your arms look very short with 14 cm total.

Tibia looks very bad and even if you do just 4-5 cm, it will still look bad nevertheless.

Femur looks good for first LL and IMO you won't need to do tibia later if you don't exceed 6.5 cm in femurs.

My honest recommendation based on your proportions is to do femurs for about 6.5 cm max (not full 7 cm) for better proportions and recovery. Anything past 6.5 cm on femurs increase complications and recovery time exponentially.

IMO, just do 5 cm on femurs and call it a day. You'll recover much faster and have decent height of 181 cm with much better proportions.

Yeah 14 cm looks very disproportional, I think 5.5 cm for femurs and 4.5 cm for tibias would be better, thats 10 cm in total

No, your tibia is already long relative to your femur. If you want to get the best tib:femur ratio, just lengthen your femurs for 5-6 cm and that's it, you don't need to lengthen your tibia at all. Besides, you will look best at 181-182 cm height with 5-6 cm femur lengthening only. No more than 6 cm on femur, otherwise your arms will start to look short relative to your knee.