What is an efficient method to create presets?

Question

Hello all,
I am trying to create presets for my VI and I would like some input from others who've created methods for presets.  I saw this post and saw that it was possible to create a pre defined preset fairly easily.  That's good an all, but I need to update my presets on the fly.  Basically, I want to move four servos to a certain position via pulsewidth.  However, there will be many different positions (~20) I need them to be at, and trying to stop the code and put in constants seems like it will be extremely time consuming for each preset.  I would like to create a preset method which would take the servo location and store it somewhere so I can load it again later.  
One idea I had was to create a txt file and store the pulsewidth of each servo.  This way I could overwrite the file and read the file at any time.  
I have been looking into event structures, but that seems like it will go with the idea of making pre made presets.
Any help would be gladly appreciated.
Thanks,
Matt
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Answer 1

If you merely have 20 positions, which will never change, you can use an Enum control wired to a case structure (all of this in a while loop).  If the Enum control value changes, select the case structure which contains the correct pulswidth values.  
If your positions could change overtime, an external file would be a good way to go.  Look at Configuration Files.  You can write one section for each position.  In each section, you will store the 4 pulsewidth values you need.