HI you really dont want to add washers, it pulls right because of what they call a P Factor. the Prop is turning right and engine is set a little to the rightthat is why your plane pulls to the right. hold a little ridder and once you have wheels up switch toa little left aileron,once you leave the ground, andtake off at full throttle. Onceoffice the ground and safe from atip stall level off back the throttle to half and climb to the height you want.the thrust is in there to keep the plane flying better in the air,. i have 3 Nexstars all set up in different ways. one with a 2 stroke one with a 4 stroke OS56a and i am working on my third going to make it a tail dragger and stright wings. the nexstar is a great plane for newbees and easy to repair.
POHeller