FA: I'm afraid you made the same mistake as Emperor Alexander III did with Volkov! He wasn't selected to serve in the Semyonovsky Guards but rather in the Pavlovsky Guards even though he didn't have its physical type. As it had been customary since the mid 1830s, each Guard regiment had a specific physical type for its enlisted men. Every autumn the new recruits were personally selected by the Grand Duke in command of the Guards (although Alexander II often did it himself). The Semyonovsky Regiment type was described as tall blond (or auburn) men with long "clean" faces (i.e. no beards) and blue eyes "to match the collar colour". The Regiment was supposed to serve as a "living monument to its long-time colonel-in-chief Emperor Alexander I" who had been especially fond of it.
As Volkov recalled: "It was Grand Duke Alexander Alexandrovich, the future Emperor Alexander III, who had given me the first classification. Much later, during my service in the Mobile Batallion of the Guard, then Emperor Alexander III, having noticed me one day, asked me why I had begun in the Pavlovsky Regiment, and not in the Semenovsky Regiment - since my appearance was much more like that of the typical Semenovsky solider and unlike the typical Pavlovsky - and he also asked my who had made that classification. To his questions, I replied: "It was Your Majesty Himself, who made that classification," and the Emperor said to me: "Well then, it was I who is mistaken."
So based on this imperial precedent I guess your mistake has to be excused too! :-)