i have had my tsunami for about 2 months now and i have never touched the low speed needle, i was told that it needs to be flush and it will be fine, is this true ? i can't even find a screw driver that will fit it to make it turn , if there is no need to mess with it ,should i be able to tune it with just the high speed needle and idol screw only? and should i adjust idol screw first before the high speed needle?

the idle controls the speed of the engine when no throttle is give so if its sits in place fine there is no need to touch same goes for the low end needle, if it has good take off power then leave it alone too, lol

If it's bogging on take off then you can give it a tiny little tweek, but other wise leave it alone.