I can't see the figures on my phone, but I think this indicates it's however you can generate the force just behind the cutting edge.No. Breakout is lift at or near ground level. Nothing more. Curl has no bearing on breakout
Thanks for all the responses.
They confirmed my 'gut feeling' that the Challenge wouldn't be a great choice. I'll stick with Kubota for the FEL and 4:1.
Now, all I need to do is decide on whether to get a box scraper, grader blade or grader-scraper, and I'll be ready to 'pull the trigger'.