GET A HELIX SI THAT HAVE TRUE DI AND THAT WAY YOU WILL HAVE BOTH AT FRONT,AS YOU USE IT JUST CHANGE IT TO THE WAY YOU WANT IT THAT DAY,AND IF YOU HAVE TO GET A SMALLER UNIT THAN YOU WOULD LIKE ,JUST SET SI UP WITH RIGHT SIDE AT TOP AND LEFT SIDE AT BOTTOM ,THAT WAY A 9 INCH SCREEN WILL BE LIKE A 18 INCH SCREEN ,SHOULD BE ABLE TO SEE OBJECTS FAIRLY EASY THEN