my proportions and plans

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Hey guys,

i'm a new a member on the forum, i've already have some plans with ll, but first here are my stats:
21 years old, male
morning height: 173,5 cm evening height: 172 cm
weight: ~75 kg
Wingspan: ~180 cm
sitting height: 90-91 cm
inseam is 30 inch !max!
my plan is 7 cm internal femur lengthening and 5 cm external tibia lengthening. so my final height would be 184-5 cm, that would be awesome for me...
what do think about my plans and my (current and future) proportions?

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Thank you for your answer, Uppland! I've measured my arm length (hope i did it right), the result was ~78 cm. I did some other measuring too: from the floor to the belly button: 102-103 cm, from the belly button to the top of the head: 70 cm, and from the floor to the tip of the middlefinger: ~60 cm
I also maked a 12 cm mockup (i've lengthened the femurs and the tibias too): http://i.imgur.com/n6HhmDj.jpg

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Thanks for all answers, guys! I really hope i can go for 12 cm! I don't want to go above 7 cm per segment, so that's my problem with the 8 cm, it's just too much in my opinion. (and two surgeries for 8 cm is madness, i think). i've took some photos in clothes and shoes, so i'll make these mockups soon. i'm also thinking about the doctors, maybe dr Guichet would be the best choice for femurs, and Dr Salameh or Dr Bagirov for tibias. What do u think?

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Hey guys,

I've got back my laptop, so i can show you my full dress mockup 
In this picture (with my shoes) my height is ~187-188 cm

What do you think? Does it look normal with dress too?