Only just spotted this Steve, after so long !
First, thanks very much for the compliment !
Second, your model looks the biz !
Yes, I believe you may be right about the frozen flap, although I've read of both versions. And you're correct about the 'Varus Tuetonicus' - Warning Order (Standby) and Executive Order (Go). I decided the use the complete code, as I believe, from various accounts, that both words were used in the final Executive Order, according to some accounts I've read. I need to get the 'Bodenplatte' book (by Norman Franks, if my memory is correct) back from the friend I loaned it to around 10 years ago !
I presume you have it or have read it - very comprehensive.