Flew with Carlos today as Additional Pilot. Shot the RNAV 06 approach into KCPC twice using GTN for first time to fly approach and missed. The AP performed as expected with the corrected trim motor direction configuration. Used TOGA button for first time. Landed and refueled. Worked on pitch servo control settings to reduce oscillations on final with flaps deployed. CG was far aft with 100 lbs of sand in baggage area which was probably a contributing factor. Will try again with CG further forward. Flew RVAV 15 approach at KEYF and landed to borrow the courtesy car for lunch at Cape Fear Vineyard. Adjusted stall vane to reduce nuisance alerts. Flew flight plan that finished with full RNAV-05 approach, Carlos calling radio. Went missed and entered hold then repeated and landed. Noticed G5 and G3X pitch offset. It's likely since I haven't performed pitch/roll calibration procedure on G5 yet. Good setting for final approach: - 15.7 in MAP, 50% power, no flaps,110 kts - 13.2 in MAP, 40% power, full flaps, 83 kts Post-Flight Squawk List: 1. Remove alternate air cable and find cause for reduced stroke. 2. Perform pitch/roll calibration of G5. 3. Email g3expert about pitch servo settings. 4. Email Stein and g3expert about alternator alert/alarm configuration one the G3X 5. Recalibrate AoA so it start displaying at a slower speed, say 90 kts.