Ruder laufen im Heading hold Modus langsam auf neutral

My measurements:
PowerBox SRS. - With the transmitter sticks at neutral the SRS is in HH. Lift the tail (nose down) and the elevator goes up, which would try to level the plane if it were in the air. Lower the tail to its original position and the elevator returns to its original neutral position. The plane flies great and I am very happy with it including take offs and landings.

Assist 1.19. - Assist in HH mode and sticks at neutral. Lift the tail and the elevator goes up like the SRS. Lower the tail to its original position and the elevator goes past neutral to some small down elevator deflection and then slowly returns to neutral.
I found this impossible to fly. I added the automatic switch to damping when moving the sticks and it seemed to solve the problem because as soon as you are in Damping Only, neutral stick results in neutral elevator. I could then take off and land and fly very well with that setup.

I have since put it in a better airplane and I am not completely satisfied with it. There is something happening that I have not been able to define or correct. I would like to hear from anyone that is completely happy with Assist with V1.19.

Regards, Jim

One thing I did not make clear when describing the PoereBox SRS HH mode is the fact it has a very simple algorithm and that is probably why it works so well. It basically drives the servo in a direction to correct for any deviation the plane makes from its current heading when the stick is at neutral. For example, if you center the elevator stick with the plane climbing at a 45 degree angle, and the nose drops and the Assist senses it is climbing at 40 degrees, it will apply some up elevator. The amount of up elevator is a function of the angle it is diving (5 degrees) and the HH gain setting. As long as it is diving at a given angle the elevator will hold a fixed up command. It will not change with time. It will go back to neutral as the plane returns to the 45 degree climb. If the plane over shot and climbed at 46 degrees it would apply some down elevator and would go to neutral elevator when the plane was at 45 degrees. You can test for this on the ground.

On the other hand the Assist does not hold the servo position but starts reducing the servo command even if the plane is not reducing the dive angle. I liked to understand how this is supposed to work. I'd love to talk to the people specifying the design requirements for the Assist Heading Hold mode.

When HH works well it is a joy to fly.

Jim O