2018-09-21 by per@...
Well, I am just editing curves through the curve creator invocable from QTRgui on windows. When I look at the files that are loaded in the history of this tool, they are .qidf files. However, when I have edited a curve using the curve editor and saved it is seems it has only showed up as .quad files in the QuadTone/QuadP800 directory (not as new .qidf files) which is a little bit odd to me---especially as the tool pretends that there is a qidf file in the history of tool for the edited file.
Nevertheless, my linearized file exists as a .quad in the QuadP800 directory, and it seems that if I put new .quad files in the directory then they show up as usable curves in QtrGui. So your proposed flow seems workeable for me. I will have to give it a try. Thanks for the tip.