Thanks I think I will go ahead and do that just for the sake of completion and being able to lock them.
There is a known issue where the settings are not restored on different inputs which apparently is due to be fixed in the next firmware release. I quote the below from the review I linked the other day:
“The projector has a few odd quirks in terms of how it stores and/or returns to its different picture modes. Alterations you make to the various presets—Cinema, Reference, User, or HDR for example—are stored and carry across all the HDMI inputs. However, I noticed that—similar to the UHD52ALV that we
recently reviewed, the P1's HDMI inputs recognize the EDID identifier of specific components and automatically restore the last settings used regardless of what calibration might have been done to that input in the interim. Therefore, calibrating something like the Reference mode on the HDMI 1 input with my
Murideo Six-G pattern generator and
Calman software, and then plugging in my disc player or cable box, resulted in the projector restoring whatever preset mode and settings were last used with that source and ignoring the new settings. You can even end up with two different Reference modes on the same HDMI input, each with settings specific to a different source component.
This required the extra step of having to record calibrated settings and re-entering them once the permanent source was connected, and to do this for each preset I calibrated for each source (i.e., one for dark-room viewing and one for bright-room viewing). I also noticed that the projector responded with different settings to different signal resolutions coming from the same source, whether or not it had invoked its HDR mode. This cropped up with my Panasonic DP-UB820 UHD Blu-ray player when jumping from UHD-resolution HDR discs back to 1080p SDR content, where the projector would exit the HDR mode and automatically select its default Cinema mode instead of the previously calibrated Reference or other mode. I had to go to the menu each time and manually reselect my preferred viewing mode for SDR content. The same thing happened when I watched regular 1080p SDR Blu-rays and switched from straight 1080p output on the player to scaled 2160p SDR output. Fortunately, Optoma says that particular issue will be addressed in an upcoming firmware update expected by mid-June.”