Only doing 5.5 to 6 cm in Femur worth it ?

I am 168 cm at night. But Most of Height comes from Leg. I have somehow smaller torso and longer leg.
My wingspan is only 165 cm. So I am kinda hesitant to lengthen more than 5-6 cm.

My Tibia is some how quite long. Its almost as long as femur. Maybe femur is long by 2-3 cm but it looks of similar length. And I tried to measure with tape i get the difference of only 1 inch. I have been staring at legs of so many people walking by and I notice I do have quite a long tibia for my height.

So I am thinking of getting only 5 to 6 cm in Femur. It would not alter the ideal 0.8 ratio of tibia/femur. My current Tibia is like 16 inches and Femur is 17 inches. Measured using tape by myself lol. I did watch lots of youtube videos to get it as right as possible.

My wingspan is already smaller than my height so I don't wanna go overboard. I don't wanna touch tibia.

I saw somewhere that 10 cm difference between wingspan and Height is fine. So i think 5 to 6 cm in femur is ideal.

But then I came across a youtube video of LiveLifetaller and the guy had gone Femur lengthening of like 5 cm i think and he said that he Regret doing only 5 cm. 
I mean going through all the hardship, throwing so much money away and losing 1 year of your life and then having the regret that 5 cm was not fulfilling would be soul crushing.

I also don't wanna change my height that much as I come from country with shorter average height. I don't wanna be like totally unrecognizable guy like mr. brokenzbone going from  5'6 to 6 feet. I am only looking for slight boost to be around my peers height. My friends are mostly around 175 cm.

But i am having second thought now as if i go through all that pain and i don't notice the difference. Damn that would be hard to digest in my already frustrating life. 

I also have Anterior pelvic tilt. I am hoping to get alteast 1 cm after correcting the APT. Not too sure if the height gain is possible though.

after 5 -6 cm it would put me in 5'8-9 territory. Which is closer towards average. I am from Asia but planning to move to Australia in near future.

Thanks for the long read. Please provide any suggestion.

if u were doing femur u would recover much faster . depends on what your doing. monorail lon femur im assuming. i would aim for 7 cm and if u cant go on with the pain and being lonely at the time then u can shorten the lengthening but 7 cm is great and life changing. u wouldnt need any more in the future since thats what u plan.
if ur growing why not take the 7 cm since growing is addicting. no regrets after finishing what u came to do.