Had a few more flight attempts but my new YS is acting up, all deadsticks after a few minutes. I did move the CG aft by moving the battery aft of the wing tube on the vertical tank support, lightened spinner backplate, and 1 oz weight in the tail, so CG is probably just aft of the wing tube aft edge. Needed less down in inverted and all the tracking including up and KE still great. Maybe this will affect my spins/snaps? Too soon to tell. I PM's Bryan Hebert but no feedback yet.