If I was starting from scratch I would probably put an effect like a color wash so that they would be easy to find when I went to vixen to do editing there. I do go back and forth to vixen and xlights because I have things I created last year for the RGB lights that I have been unable to recreate with the current nutcracker software. I can get close to some, but not to all. my understanding of none, none will just prevent xlights from writing over anything that you already have in an effect in a sequence that you converted into xlights, but I have found that if I do not create anything for the element(model) that I want to leave alone, I just never create an effect in nutcracker for that model and xlights leave those channels alone when you save the file. For example, I added 6 RGB porch columns this year. I have them in my vixen profile and I have them each as a model in nutcracker. I have opened a vixen sequence, added effects for the porch columns saved the file, exported it back to vixen, opened it in vixen and the original stuff is still there along with the new RGB effects that I added.