I’m wondering if vehicle manufacturers test their crumple zones with a full load (commercial) because if they don’t then the extra weight might squat them anyway rather than absorbing the impact.
Ratchet straps? Too many variables for me, did the straps come from the pound shop? Are the mounting points strong enough, is it strapped correctly? Are there enough hook points?
Personally I don’t fancy using anything that hasn’t had some kind of test.
If you get the chance take a look at Dazmonds, jesus christ it’s even mounted the wrong way round to allow the tank through the cage.