That is very impressive you know. To be able to play the proper version of Flight of the Bumblebee on *any* instrument after only three years of study is pretty much prodigy level, even with lots of practice! Even though it is not listed in the current syllabi on the exams boards, I hazard to guess it is diploma level (and not necessarily the first level ones either!).
I have a friend who used to play the flute excellently (got a music scholarship for secondary school and everything) and she said it was diabolical, practically triple tonguing all the way through.