I started with 2 degrees of right thrust, and I still had to hold a lot of right rudder in a hover and TR, so that was increased to 2.75 deg right, and it improved the hover. I cannot imagine trying to fly this plane with 0-0 thrust. I just don't get it. It's barely possible to torque roll it with 2 degrees, with 0 degrees it would be nearly impossible I think. I have added about 1 deg of upthrust as well. Perhaps placing my batteries and fuel tank higher in the fuselage would help reduce the need for upthrust. I haven't specifically done a harrier with the plane, but it is very stable at high angles of attack. I have a Pizzaz .40 size aerobat that falls off on one wing in the blink of an eye, literally. The Pizazz is going to get wing tip fences to help with that. The Diablotin is as stable as a Seniorita at high angles of attack.