I saw a cool way to level your swash on youtube. You use an allen wrench.

Remove the head above the swash. Twist or cable tie an allen wrench upside down or 90 degree at bottom, to the main shaft. Now twist the wrench around the shaft is the swash the same at all points around the shaft? if no alter until the allen wrench is exactly the same at all spots. MAKE SURE to do this with esc on, motor disco'ed, idle up on and center left sitck, and swashplate should not hit the base if you do full downward motion on stick. You will notice some binding on the collar if you have it too low.

Once the swash is level then you can work on leveling everything else.

DY