Thanks for all the complements. If you caught it, I made some heavy duty steel plates that rest on top of the trailer bottom I beams and this product is secured with #8 bolts, washers and loc-nuts and these are right at the outside edge of the I beams. They sandwich this carrier in place so I didn't have to drill any holes into the trailer frame to mount this. It made installing this super easy. I only drilled two smaller holes for the U bolt that I attach the chain and shackle too.
Another video I made after mocking up the assembly and before powder coating sheet metal parts.
Video:
https://youtu.be/QWf6ycJcskg