I haven't looked at a 24 tank for a while but if the fuel tank connector is the same as the other Victa tanks it should have 2 flats ,I usually just hold the inner nut with a big flat head screw driver ,you could use a flat bit of steel or long pliers .
I'm not sure why it takes 3 kg to stop kick back with the power torque when I have a power torque 460 motor that I removed the blade plate and I couldn't get any kick back, the weight on the crank is only a little more than older standard power torque motors.
