The rpm, mass and diameter was to make eos aware of potentially very dangerous spinners not what defines a spinner! It would be a bold person to suggest any spinner can be run in a netted roof. It worrys me seeing some flippers in net roof as they could easily send bolts through it.

Yes it is down to the EO what runs in their arena but that ldoesnt change what is safe and what is not. It just means if something does go wrong, and its likely it would as it has in the past, the EO would have a lot of explaining to do as its well known not to be safe.