Just writing this made me think of the following but I'm sure how to write the expression for it or even if it is possible buy what if even rows were offset by even numbers and off rows were offset by odd numbers, you would in theory never have adjacent repeats. The logic would be:
If row is odd (SegmentYCounter), translate by a random odd number between 1-7 * 0.1
If row is even (SegmentYCounter), translate by a random even number between 2-6 * 0.1
In this case, 0 & 7 would yield the same results since the tiles are .7 meters long.
hmmmm, i have to see if there is a way to write this....
Edit: Trying to wrap my head around the MOD function...