Quoted from gutz:

Its pretty easy to change the apron
Boardset pic would prove it. What looks 'off' to me is the excellent ray return wireform. It thought the early run games (that went to europe) had a straight wireform while the later US games had a squiggly wireform (like the mixmaster return). I would assume the 100 wpc dudes came at the end of the production run, but I dont know. The wireform could easily be changed too