Hi Brian,
I think as long as you let management know that you used a different aircraft, that should be fine with them(unless its not an aircraft you are able to fly yet)
As for it not being in the Aircraft list, maybe its got a different kind of aircraft code? Sometimes I find that someo f the abbreviations aren't that easy to pick up and say oh yeah! thats the 747-200 or something.
Or it just might not be on the list, which Im sure management would be happy to fix
I see this is ur first post some im assuming your new to the VA, welcome!
-Matt