Yes Tim, but the tech checker or pits marshal can argue it isnt stable enough. I know I would, and would certainly have brought this issue up for the Dutch event where I was -still am, the event is postponed- to be in charge of safety.
That featherweight is still 12 kilos aimed at your feet and shins, not to mention what it could do when it slides off the roll and lands on your fingers. Better to have a proper cradle, in which you can transport that thing safely too, than a roll of duct-tape or similar random objects. At one point youll find yourself in need of that duct-tape and then what ?

Dedicated cradle guys, makes my heart go all soft and warm-like.