I've been some time outside of this forum.
During my absense here I made several mods to my Bixler.
First is FLAPS. Nothing special. Span and length are equal to ailerons. Pinned hinges and another HTX900 servos. I reversed one servo by myself without any additional modules (weight). If someone needs photos or have questions, just ask.
Second is new position for ailerons, flaps servo connectors. They are hot glued to fuselage and taped for redundancy. See photo.
Third is new position of ESC with heat sink on it. See photos as well. I tried to make it as smooth as possible. Three wires outside will let me easy reverse motor for another prop.