Only used this mod a couple hours and liking it so far but (yes, there is a but, sorry !
) … There is two things I noticed and not sure if it been talked about before, after all there is over 5k posts and a bit to much to read through to find out so here goes.
When moving items from Inventory Bag to Smuggler Stash using SHIFT + Left Click the item just disappears, it does work when playing without Grim Internals. Also, it works if you doing it FROM the Smuggler Stash to the Inventory Bag, so a bit strange behavior.
I do have Grim UI: X-mod installed as well, for larger stash space. Would that possible interfere with the SHIFT + Left Click function when using GrimInternals ??
Then I also noticed when playing the game through GrimInternal exe, the Time Played/Last Played in GOG Galaxy is not counted, unless you happen to trigger a Achievement, then the Time/Last Played gets triggered. I know this isn’t that important, but thought I mention it incase it hasn’t been before.
I do apologize if the above have been posted before but I’m afraid it is way to many posts to go through to find out ! 
Thanks again for such an awesome mod ! 