The reason i chose FL410 was my OFP used this ODD Flight level because in France RVSM airspace flights heading south will use ODD FLs and north EVEN FLs unlike standard ICAO east / west rule.
But the SOPs i follow that i got from a 737NG pilot never allows flying above OPT unless you have a good reason.
Yeh MAX altitude is where an aircraft can achieve the required buffet margin with rate of climb or is thrust limited? Thats what i only know lol
No RCMD level on my FMC just OPT. So always try to operate below MAX ALT by 1000 in rough air and 800 in smooth air so i read?
Would of it been better if i flew below OPT at FL390 and took a slightly penalty instead of FL410?