That about sums it up, cant set more than about 60% without moving. Brakes will happily hold the main wheels in a fixed position but unfortunately the jet will then drag said wheels along the deck until you are off the end and airborne.
Which means beers for the maintainers who have to change your tyres, and beers for Wings who's not impressed with the 300 ft long double black stripe you've added to the deck markings.
I've watched the "trial". Mildly amusing. At least in a Harrier you can land again with shredded tyres without any tears.