@splinter - I cracked and built you a demo. It’s a simple one-to-many relationship - you have groups, with members, and you can edit the membership list with a searchable paginated popup.
Here it is (you’ll need to change the dependencies to your own copy of the Table app and recreate the Table components): https://anvil.works/ide#clone:3CUOLZTFPAYLMH6Y=OQK35BVP4RBU4VXZPXUZCV3H