Finally took delivery...

[taken]

I wouldn't worry at ALL about doing it as txrider posted. It's done all the time by toyhauler owners without issue. The lateral pull on the rings is so minimal it's not even worth mentioning. Also, there's a lot more to the rings and their mounting bolts than the couple of bolts that hold down a chock in its standard mounting method which handles the same lateral force.

[Tx_Rider]

Taranwanderer

I dont think there will be any lateral shear on the rings, the angled bar slotted through the rings is just to keep the chock from moving around. The weight of the bike should keep the chock planted and the strap hooks will go through the rings with the straps pulling vertically.

I'm not taking credit for this idea, others have used it successfully.
It's either this method for around $100 or use the "Bolt it on" mount system for $450. I'm not going to bolt anything through the floor so these seem to be the best alternatives, for me.