Maccers

Am trying to remove a safety devices "Q22" 6 point bolt in roll cage from a mates classic impreza. We have got all the single bits out, but struggling with the main rear section.

Have removed all interior and trim, steering wheel and both rear doors. The cage legs have been ratcheted to bring them in slightly.

Short of angle grinding the car body or the cage, I just cant see how it comes out.

Anyone got any ideas?