Mirrored the hook to make it double sided and stuck it to the 9mm big thread t-bolt for the multiboard for the strongest possible part. 

I then sliced it in halfs to be printed without supports as well as making them stronger. If you want, you can glue the halves together, but I don't find it necessary. Doing so would make them even stronger. If you need that much durability, then you probably shouldn't be using the multiboard tiles as that will become the weakest link.

Remixed in tinkercad. I would like a nicer version somewhere down the line, but I am new to all this.