Hi,
I find very useful the ability to add custom mods in this folder that are automatically installed with Aslain. However it lacks the handling of /mods/ folder. I just installed Aslain modpack 0.9.17.1#03b with the "cleaning" option checked, and I noticed it also deletes the /mods/ folder, not only the /res_mods/ one.
So it would be nice to add handling of this /mods/ folder for custom mods installation, foe a 100% automatic installation again.