Thanks, its just a slow process, we’re just a 2 man team both working fulltime in the game industry by day, so only got some hours in the evening to work on this project!
You can easily use sphere/cube collision overlaps. Its actually easier than mesh overlaps, those often get buggy results (need convex auto generated collision, else the overlap events trigger inconsistently). You can try to lerp to the target gravity vector to get a smooth transition. You can always send me a pm if you need any help.