All I know is that It took me 2 days to explain to a student's parents why they should pay for the lesson when I instructed their son how to properly clean and care for his trumpet. What did they cite?........... ZacharyMusic!! I had to explain to them the first day how what he claimed is cr*p, and the second day having them come back for my next lesson to WATCH as I assisted my student to clean out her leadpipe. (she is a candy sucker and mt. dew drinker, so it was a good idea) Then I explained it again. THank you Mr. Zachary.