To Julch,

Have a few more thoughts:

Before your first flight (positive thinking), drive your Whopper around the field without the blades on. Get a feel for how sensitive the tail steering is.

Pre spin the rotor manually before ingaging the run up drive. Engine should be just above a idle.

During take off, head straight into the wind, make sure you have at least 10 mph, it helps, and stand right behind the Whopper.

Do not force a lift off! Slight elevator back pressure only. Too much cyclic pitch during a take off run can slow the rotor speed.
If the head speed is slightly low, the Whopper will lift off and roll to the right. Advancing blade on the left sees more lift. Correction must be made with the rudder. Once level, the Whopper will sustain a 30 degree climb out. Turns down wind require less rudder than turns up wind.

Make sure O ring in head drive is clean and free from excess exhaust oil. The O ring doesn't have to be dry, just wipe the cone and O ring with a clean rag.

Let me know how ou make out.