KSC gave me a hand to retrieve the Horizontal Stab. and Elevator from the storage shed. I wanted to ensure the trim was configured correctly through V-PX. The Sling4 POH states the " Control Surface Travel Limits " for the trim Tab is 5 degrees UP and 25 degrees DOWN. The Sling4 " Finishing Kit " says 8 degrees of up deflection of the trim tab from the elevator. I have set the trim tab to 8 degrees Up deflection, which gives me 25 degrees Down deflection. I have configured the V-PX to display the limits and a trim neutral position. The neutral position ( i.e which will be the Takeoff trim position ) is easily changed once test flying starts and the best position for trim on Takeoff is established.