Hi @Asuku ,

From my understanding, you solely want to move this group along a tilted axis, correct? 

If so, I think you should try using a pair of coordinate breaks around your inter-group spacing, like so: 

With a coordinate break on Surface 3, you can enter the tilt angle of your blue axis in degrees into the “Tilt About X” column (shown as “Par 3(unread)” in my image above), I picked 12 arbitrarily. You can also tilt about Y with the next column to the right if you’d prefer. 

In my example, when I adjust the thickness of surface 4, I am able to translate group 2 along the tilted axis, and then in line 5, OpticStudio straightens the group again with the pickup on Parameter 3 (Tilt About X). 

You can also use the Decenter X or Decenter Y parameters of the Coordinate Break surfaces if you would like to decenter the group before, or after, your translation along the tilted axis, if needed.

The easiest way to do the coordinate break would be to select your inter-group spacing surface (Surface 4 in my example) and use the Tilt/Decenter Elements tool from the toolbar of the Lens Data Editor. 

Best,

Nikki