Here are the pics of it all converted to Space Mission ill add a link to a video of it flashing and playing once i get the link.  
               The whole thing runs off a SLA battery which is charged via the hidden plug in the coin return slot. It will run for 3 days straigh with out a charge. I could have installed a larger battery for longer but wasnt really needed.    

               To make the playfield fall i moved the original brackets so that it had a slope while the glass stayed flat.  The plunger was simply turned upside down which made it low enough to hit the ball in the new playfield position. I also modified the apron so that the front of it sat closer to the glass so it wouldnt look to strange

    Ive also added a mock up with the original artwork on the side which i was going to do but my mate said he would rather it white so who was i to say no.  (Saved me tons of work yipee)