Heh... Good luck tomorrow Luke.
How far on the bolts are the t nuts? I've got some long special keys that upse at work just thinking will it slip over the t nut to hold it then un bolt!
I'm going to try attacking it tomorrow night with a drill, and if that doesnt work then well, it's buggered.
I'm fairly sure that it will not be possible to jam up the T-nuts, they've just torn through the original wood, they are really stuck on the bolts