OK I was testing with 10 copies of a 32-pixel pattern. So my total image width is 320.

U_Scale = 10, and U_Offset of whole number produced a very slight shift, increasing until I got to 9. At 10, it dropped back to the shift associated with 0. So there is some modulo 1.0 going on inside.

Using MG's clue, I set about attempting to factor either U_Offset or U_Scale. I finally found an adjustment that works.

Set the U_Scale = 10 * (w-1)/w

Where 'w' is your width in pixels of all ten digits.

In my case it was 10 * 319 / 320 that worked.

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