Mike,
Not sure about the Rudder, mine is essentially an RV-9 (Part Numbers R-915, 916, 901, etc...Note the 9's in the part numbers).
As for the trim: There isn't a difference between the manual or electric trim when you order the empennage kit. When you build the left elevator, if you have the trim motor, you mount it to an access plate on the bottom of the elevator and cut a set of trim tab horns for the electric trim. The horns have tabs with holes for both manual and electric trim...you just cut off the part you don't need.
You get an $80 credit for using the electrim trim when you order the fuselage. Basically you don't need the manual trim cable that is normally supplied.
Eric