Slide carb or rotary carb? They differ quite a bit on the LSN.
LSN - 10C Slide
First rotate the Mixture Control
Valve until its slotted head is
flush with the carburetor body.
Then screw the valve in exactly
2.5 turn.
This is the standard position.
LSN - 10E-R Rotary
First rotate the Mixture Control
Valve until its slotted head is
flush with the carburetor body.
Then screw the valve in
exactly 0.5 turn.
This is the standard position.
It appears the HSN is the same for both:
HSN
Turn the needle-valve clockwise slowly and gently until it
stops. This is the fully closed position.Do not use
force to turn the needle-valve beyond this point.
Open the Needle-Valve 2 turns from the fully closed
position.
Idle also varies from .3mm-.5mm for the slide to 1mm for the rotary.
OS also doesn't like making it easy, you have to read a decent chunk of the manual to find the settings:
http://manuals.hobbico.com/osm/15cv-cv-x-manual.pdf
The manual has diagrams on what they are talking about in reference to "the body of the carb".