Recommend me a length based on my worrying proportions

I've been dwelling over my proportions for a while now and worried that I'll look weird so I wanted some input on how much I should lengthen. Mostly concerned about sitting height.

Current height: 5'6"
Sitting height: 33.5" – 85 – 85.5 cm
SH/H ratio: 50.8%~
Wingspan: 70.1" – 178 cm
Crotch to floor inseam: 30.75" – 31"
Inseam to height ratio: 46.7%
Roughly

Now I would REALLY not be happy to be under 5'9" (175 cm) although I could live with 5'8" if more length would make me terribly disproportionate, but I'm really tempted and want to do two lengthenings to try to reach 5'11" (180 cm) which would totally resolve my height neurosis but I find my sitting height to be very limiting and worrisome. I could try to work my glutes to gain a cm or two but either way I would like some input on how much I should lengthen.
5'10" – 5'11" I would be very happy with, 5'9" would be decent but 5'8" meh and not that satisfactory although still better than my current position.

Please respond.

at your current stats you wouldn't look out of the ordinary with the full 8 cms in femur to get you to slightly above 5'9

just work the gluts afterwards and you'll be fine sitting height doesn't change much between 5'6 and 5'9 I was 5'6 and my friend who was 5'9 was just slightly taller than me sitting down.

Thanks, I guess I will shoot for that then. Still wondering what if I tried to do two lengthenings 
Btw, your diary is really inspiring, totally rooted for you man. And may I ask how do you feel at 5'9", tall enough? Because some people consider that still kinda short although that might be due to exaggeration and skewed perception although statistically it's bang on average.

I'm at the same place as you but I think once you get the surgery done you worry about sitting height less. My only concern is being taller than my girlfriend when I'm sitting since my standing height will be good for me.

bump
Is 180 even thinkable?

It's hard to say without a photo.  Extend your legs in Paint and see how it looks

Thanks Scarface! I'd advice as my doctor advised, do the femurs first 7-8 CMs as your goal may me, see how you feel and then if you want to proceed to tibias you'll be a pro at the procedure and second time around should be easier for you. I feel tall enough, I don't worry about height anymore I'm happy with my height and my recovery so far, still have work to do I'm probably at 50% of where I want to be.

Yo dude scarface..if u wanna know how u would look like at 1.8m aka 5'11..then let me suggest u a guy called Max holloway..google him and u will find how u wld nearly look at that height..his Height-180cm wingpan-175cm leg reach42 inches.

I don't know, his torso looks rather balanced, not short actually unlike mine post LL. Are you sure he has a 42 in leg reach , equivalent to a 36 inseam? And how do you measure leg reach?

I dnt knw about his inseam but his leg reach is 42 imches and u measure leg reach from ur hip bone(pubis) to the ground u r standing on(needs to be flat)....n yeah he kinda looks normal but his measurements should be correct as he is a professional UFC MMA fighter.