I have used several efka boxes. The most difficult to set up is AB321. In fact, you can choose DA321. This is the box I use on my machine now. The setting is relatively simple, and there is no parking jitter problem you mentioned. With DC1550 horsepower is enough, much easier than AB321. The problem I encountered with the AB321 is: after resetting it has a safety lock, you need to change 245 to 0; 290 is 47, even if you use 5913, you can't modify it, so many functions can't be used; the shortcut keys on the 820 display screen can't be used. Use... If you have a problem with parking jitter, you can try to have an option to lock the power of the nose when parking (153). If the value is increased, it should be able to lock without jitter.