andys description for setting up a v curve is pretty good there so i dont think i need to add any thing here.. a good method ive used and seems to be good is to bolt/tie/fasten your heli to a table or ground and go through the throttle pitch settings on the ground...youll still need to fine tune it in the air but it cuts out loads of mucking around time...

oh i almost forgot.regarding the lean running.. while your heli is tied downd look out for smoke from the exhaust at all positions of the throttle..if the smoke becomes less or stops then it can nearly always be attributed to being to lean so either/or both the mid or high needle valve settings need to be richened,you want a good plume of smoke so to speak at all position's of the throttle stick...