Thanks for the response! That’s weird, I precached the recommended 300 pages upon initial setup, I apparently have 3452 mods in the repository. I guess it just didn’t grab the ones I’m using? I’ll go precache 600 just to be certain.
Is there a way to limit it to only grab mods from the version I intend to use? Or would that not be possible/worth doing?
And no worries! I can do it by hand if need be, it’s no biggie. 
Take your time, there’s no rush whatsoever.
Edit: After having precached 600, it’s still prompting me to link to most of the mods. I’ll do it manually, but I figured I’d mention.
Edit 2: Not sure if this means anything, but I decided to check the repository (now at 3769 mods) for some of the ones it’s prompting me for, and at least one of them IS there, and is a version currently on Curseforge (actually additions r150, if that matters). So perhaps I’m importing things incorrectly or something.