MHawker, We two newbe's will figure this out together! If the Extra is the same as my Staudecher ......you want to move the engine to the left of center 5MM to center the the prop hub in the center of the cowl opening to off set the 2 deg right thrust built into the motor box. looking at it from the front that is.

my sister lives in Frederick CO and our club field LAMA is 2 miles west of Frederick.

Regards
Mark