Actually I am a bodybuilder but as a fellow bodybuilder you know that it makes no difference with girls when the guy is short.
I can't wait to do lengthening but I need to continue with bodybuilding afterwards so I will only do 4-5cm of lengthening with rozbruch.
I continued amateur bbing with 7.5cm at tibias and a bad atl surgery and I will continue it despite a corrective surgery to shorten my tendons and fix a minor misalignment on my right tibia that I did one week ago and another 6-7 cm I plan to add to my femurs on 2 years.
If you can workout with 5cm lengthening you will with 7cm too if you have no complications. This difference in femur is not that big.
However if you believe than hiting less than 5.10 from 5.8 will be enough to cure your height dysphoria, then yes it would be wise to not surpass 5cm.
Personally I know that with femurs 6 even 7cm are not risky for most people and I would try to lengthen that much to reach a solid 5.11 which is the threshold for me where height stops to matter.
Anyone has their needs. I just tell you to think very careful because its a pity to do this surgery and be not happy with your new height while you would if you lengthened 2cm more.
So if you are completely ok with 5cm, the better for you.