Hello there! It does appear that you have stumbled upon the Jello Aircraft Corporation. Here at Jello Aircraft, we believe in good old fashioned MARKS as a way of designating variants. None of those -shudder- silly letter designations here, thank you.
-Working on my pilot's license (i.e. saving money and flying on fsx)
-Been playing SP for over three years.
-I build things very s l o w l y.
-I may rickroll you. Be warned.
Please do come again!