No. I predict they fold when they miss the arbitrary deadline.
Even if Nelson gets the 70% of the undervote it is still not enough to overcome his deficit. And I think the fraud becomes apparent if they meet the deadline.
Better for them to fail trying, and give it up.
Attorneys will want to drag it out and keep billing Bill Nelson.
How about all the ballots that had undervotes on Election Day then got Nelson bubbled in when the Board of elections barred observers?