Waldo I think some stick on weights just for trial and error is the way to go. From what I seen she was really tail heavy but it looked like she could do some wonderful tailslides and she was a natural at hovering.
Now a movable weight system in her would be great.
I only wish I wasn't so busy I would copy your plans and build a twripe, It was sooooooooo cool just hanging there on her prop.
Great Job and of course this is your 1st prototype WALDO TWRIPE 01