Well. I packaged up my calipers and sent them bsck. I used their shipping label. Almost $8 that is taken off the core return charge. Let's see how this goes. I think I was charged $19 for each caliper. So $38 total minus the $8 should be $30 credited back to my card.
As an update. I got $33 credited back to my account. Just a pain in the arse to go through the process.
Better than having them sitting in a box in my garage.