Originally Posted by Flanno

That does seem wierd, but as you stated it runs fine !
If your happy leave it, but if your curios, as I also am;
When the engine gets up to temp, does it run on when back off the throttle ?
This would indicate a fat bottom hiding a wide idle gap.
you stated that if you lean on the LSN the idle rises, try this again just a little at a time untill it just seems to rise and try turning down the idle, does the idle drop ? If not,stop, If so, keep going only in small incriments untill the idle gap reduction doesn't reduse the idle, this indicates you'v gone too far.
Richen the LSN about 1/2 a turn and turn up the idle again untill at a point where engine can keep running.

PS; this is done while engine is at full temperature.

Once you have done this and you seem to lose power or lean bog, try richening the HSN untill this is fixed, the reason being that your old LSN fat setting would have hiden a lean HSN setting.

I hope I made sence, I'm hopeless at trying to explain on line. LOL.