Okay - got to maiden her today (no vid, sorry).
Maiden was with the 1600mAh pulled all the way to the front. Balanced on the CG marks from the plans (so about 1" back from the LE). I would have preferred to make her a tad nose heavy for the maiden but didn't want to try her with the extra weight of the 2200mAh.
She flew and survived the maiden but I will admit that I found her to be a bit of a hand full. She was twitchy in the pitch axis and I didn't feel comfortable flying her. When I cut the power way back, she floated around a lot easier.
A second fight with the 2200mAh (so now a little nose heavy) was not any better and I landed her pretty quickly. She was trying to knife edge quite a lot - a little rudder trim helped. No doubt she can carry the weight though.
A third flight, back with the 1600mAh this time, went pretty much as the first.
I think that there maybe a number of things going on including sloppy control surface setup (both in terms of geometry and slack), too high rates on all the control surfaces (leading to pilot induced oscillations / instability), and possibly build errors (all of these are issues with my build and not the design or plans).
Tonight I am going to give her the once over and carefully check the build for incidence or alignment problems, control surface slack and soften the throws etc.
I have no doubts that she can (and will) fly nice. At one point she entered a slow turning circle while maintaining altitude and I literally took my hands off the sticks for a good 10 seconds and she just flew lazily around in a circle. Will try to get her flying again next weekend
DamoRC