DittoI like the straps with chain ends. They work nice when space is tight and you don't have to worry about cuts. I always tie down at the axles. Sprung areas are a bad idea.
Ive got Chris Alston's on my mustang, but I really dont like their new style after the redesign.Those leaf spring plates don’t appear to be available commercially…. If I had access to fab some, would there be any interest? I’m a hobby guy, not a vendor, so caveat emptor and use at your own risk (for the attorneys).
I‘d use 1/4” steel either laser cut or plasma.