Making CC items semi-default

I had the idea to make kijiko's eyelashes and Nesurii's lunaria skindetail overlay semi-default. I would like it if they would generate on every new random townie and on sims randomized in cas. I dont want them to be completely default though, I still want the tumbnails visible in cas so I can take the cc off a specific sim if I want to. I have tried this myself already by checking 'defaultForBobyType' and DefaultForBodyTypeFemale/Male'. It didnt work like I thought it would and I dont know which other things to try or if it is possible in the first place. I preferably want it to be possible for multiple swatches of the eyelashes to be able to show up, but I would be happy with anything. For the skindetail no variation is needed, only one swatch is perfectly fine.







I am not someone who is very fimiliar with sims4studio or modding and creating, but I have done some personal experimental stuff before so I know the basics. I am curious if anyone knows if/how this would be possible.