So guys here is what a finished one looks like. The level of stabilization is unbelievable, a key factor is in the torsional rigidity of the motor arms and the weight of the props. Whatever you do electronically I think it will be impossible to replicate this with upright long motors on a long stick. Demo videos will start when the weather improves. Bur after weeks of non stop wind and rain, efforts have been shifted to further dev. work.