If you turn out the HSN you're richening it. If it's got a load of smoke you can generally lean it. When i used to run the Reedy engines id get the engine somewhere close with the tune. Setting HSN i'd put the car on the box, and when it's hot rev it for 2secs. If near the 2secs it started to choke you've obviously got it to lean. I got it to a point where it would lean bog then back it off about 1/8th to 1/4 of a turn on the HSN (just until it didn't bog). LSN was very much the same, couple of stabs of full throttle, let it settle then full throttle again. Again, i got it to a point where it would hesitate because its lean then richen it 1/4. Idle is easy, once everything else is set turn the idle needle out till it cuts. Restart it, then give it a few full throttle bursts and start to lean the idle (turning it in) until it hangs for no more than 0.5secs then idles nice and low with out cutting. Doesn't take long to do, 2-3mins of tuning once hot and you're done.