Hi Doug,
   
  If you are slipping you just need to grab your ruler a little tighter.It takes practice.When I first learned to set my tip, I would kind of push the glass and the tip against the edge of the table I was working on.Now I set it against my pointer finger. It seems more consistant for me.
           Mikole Kaar


Mikole E. Kaar 
http://www.myspace.com/mikolekaarmusic 
  http://www.youtube.com/mikolekaar
Jazz Woodwinds 
Saxes, Clarinets, Bassoon, Flute 
(760) 568-1038
  

       
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