This has a longer support within the tube to support the tail plane and stop vibration. It also features a more symmetric design for future ease-of-use.
One issue we had during the first build was warping of the ply. It sprung up and stopped the laser cutter, tripping it out. We sorted this but are considering acrylic with relief holes to reduce weight as a recommended material in the future (acrylic is 30% denser than ply).