So what ever happened with this? Did you eventually get it done?
And can I ask a dumb question.. When you found out this examiner wanted you to calculate pivitol based on TAS why didnt you just make it easy on yourself and do that? He is the one who can pass you or fail you. The book cannot give you your ticket, so why not just do it his way and move on?
Sounds to me like he got annoyed that he told you that HE wanted you to use AS not GS and you used GS anyway.
Not saying he's right I'm just saying the goal should be gettting your ticket. Not proving the examiner wrong. Unless its a safety issue who cares?