The current CG location feels pretty good and I guess after 50 flights I am pretty much knows what to expect. On the other hand, originally I had NiCad but after replacing it with Li-Ion, I didn't noticed too much of negative effect, which prompt me to plan removing a little weight at a time from the tail to see if I will like it better. It is nice to know that you are running yours at 160mm, which gives me plenty of room to experiment.

Kevin