Put 2 partial 2200mAh packs (about 10 mins worth on each) through it tonight under the back yard floodlight. Mostly hovering with rapid stick inputs to try to unsettle it.
With the shorter tail moving the weight closer to the main shafts and the reduced weight on the flybar it is a lot more responsive and as expected a bit more "stick intensive" to fly. Breeze was all over the place but no more than 5 mph. I will have a crack at shortening the flybar by 1 weight loop each end and limit the flybar pivot by a couple of degrees at a time next. I'm surprised that with all the added weight this thing still has more power than you need. half stick is hover
I may have to rig up some more weight just to see how much it can lift.