I fully agree with Ready and CaptA320 that climbing to FL410 wasn't the best option when FL370 was available. I also hadn't realised that the captain had changed the CG to 27% so as to achieve tha climb. From your first post it sounded like the MAX ALT FL409 was at the default setting, which would then have given approximately FL417 as the MAX ALT with a CG of 23%. However, in the light of this latest revelation, the captain was definately at fault. No amount of experience allows you to fiddle the figures.
I still think that this could have been resolved by talking to each other (preferably over a beer). We never stop learning in this business, and perhaps the captain might have learned something about the way that he treated you.
I congratulate you on posting this on PPRuNe. We all learn from each other, and PPRuNe has allowed the lessons to be learned by a wider audience.
I'll fly with you any day Tony.
Airclues