Hi Chris,
Actually there is no one good setup for the LSN/HSN. The setting for these needles depend on different factors. Here is some info for tuning a nitro engine that should help you find the tune you are looking for.
Here is a guide:
http://www.*********.org/cars_eng-tuning.htm
Here is some video how-tos:
http://www.youtube.com/watch?v=oSmMzpZM_As
http://www.youtube.com/watch?v=BJFsJAxNoRg
I would also suggest a temp gun. Not that you should tune to only temps, but it will aid you in understanding how your engine is running.
Hope this helps!