here's a bit of an advice from LL'er; go home. your drunk.
Being 5’11” in the Netherlands is kind of like being 5’9” in the United States, so since he actually is Dutch I actually think he has a case. Paley has written specifically about a Dutch guy he operated on who was 5’11” because he felt small. 6’0” is average for young Dutch natives (though don’t believe the Dutch people who lie and say it’s like 6’2” or whatever, it’s definitely not, even in universities… even the Dutch lie about height a lot, perhaps especially since it’s their source of national pride) so 5’11” is a reasonable height for a Dutch candidate.
OP: Do 5cm femurs and then decide from there. You’ll be 186cm which might cure your neurosis. If you don’t like it then either continue the nail until it maxes out at 8cm and you’re 189cm (I recommend this) or wait a year and then do tibias. Regardless if you stop at 186 or 189 I think you’ll be happy and probably not want to do tibias later. Just don’t do them at the same time, quadrilateral is really torture and more than twice as hard. Quadrilateral being used to get to 8cm I think is madness, I wouldn’t consider it for any height goal under 10cm. Often the candidates who do it use it to get from 5’3” to 5’8” or so, rare that someone around average height does it.