Yep. You should ALWAYS test roll to make sure rudder neutral rolls straight. Not a good thing to find out that when the nosewheel loses contact with the ground that the rudder wants to yaw the model off course. Set the nose wheel on the furthest out (least responsive) hole of the gear control arm and closest in of the servo. You can usually "override" it with a blip on the throttle to swing the rudder once you get moving, anyway.