Marcos Maniacs

Hey Guys,
    Does anyone know if we use the factory GT6 toe-in, camber and 
castor settings or did Marcos tweek them to suit his own geometry.
    Also I understand that the factory windshield is a pricey piece
mine is very badly scratched to the point where polishing it would 
really distort the glass........would it be possible to use a lexan
or plexiglass .......are they legal,the rear window I understand is
already lexan.......do the plastics scratch easy.......are they
flexible enough to accept the compound curves without distorting or
cracking.......any ideas????
   Cheers Dave #5577