Updated Rubber band loom

I recently bought a rubber band loom from the store and decided that it could easily be modeled. I modeled this after the LaRose rubber band loom but made significant changes to it. This is only half the length of the original but is expandable so you should put 2 together to get the original length or put many together to make longer creations.
The round connector was the easiest thing I could think of to make in tinkercad to link these however it may not be the best choice. If anybody has an