. . .

  • The inside of the bottom of the 'U's --- as well as the insides of all the 'B's and 'O's . . . are sharp/chamfered quadrangles . . . not 'D'-shaped or 'rounded-off' in any way
  • The arms on the lower-case 'R's and the dots on the 'I's are the same size on their respective letter sets


This should also simplify your artwork --- as well as the printer's task


HtH




PS You might wanna consider making some 'clings,' too . . . to stick on the inside of window glass



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