5 nights after tank auto bipap to system one auto

Well it's been 5 night and still I am not as comfortable on the in and out breathing as I was with my old auto bipap tank, which I used for over two years with AHI consistant at less than 2.0
I have been trying to adjust the settings of the system one auto bipap to get the rhythms of my breathing,which were tracked so well with the tank, but so far I am not there. My pressure settings are the same 18/8, and after that you can adjust the biflex 1-3, and the mask resistance. I am hoping to just get used to it and am trying to relax and not think about it, however I am prone to analyse everything so it's hard for me not to focus on it. Last night seemed better but the AHI average which is all I have right now, went up some and is 3.2 after 5 nights.

Just looking for any comparisons or feedback, I will work on it till i get right.

Sounds frustrating. Good luck!