[Harp-L] overblow practice question

[Pablo Basso <soplete@xxxxxxxxxxxx>]

Hello list.  I have a problem. I can play the overblows and overdraws, 
but i don´t know how to use them. 
What is the best way to get familiar with the OB and OD? play diferent 
scales in all 12 positions?  play melodies from others harmonica or sax 
players? .
Another question on scales:  ¿ what scales are used in diferent types of 
music? or better ¿ the scales are best to get familiar with the 
instrument or to play a certain type of music?

Thanks, merry christmas and happy new year!