Placement of smartphone on headset + calibration

[araujokth]

First of all, great work with the Holokit!

I was now taking the first steps with it, and was wondering, do you have any recommended lateral placement for the smartphone in the headset, for example, for the Iphone? was wondering how many millimeters from the edge (for example from the camera edge) should it be placed so that your transforms screen-to-display would be according to the pre-calibration you have done (reducing distortion and have a good alignment between the real world and displayed content)?

The other question was if you had any calibration sw available that a user could run, to reduce distortion and have a good alignment between the real world and displayed content?

Thanks!