Ron, Let me try to simplify the concept with this: The graphic shows what Myer's specs would be for the limo travel between the Dal-Tex corner and the TSBD corner. He shows 18 frames and 12.7ft traveled. I plotted the same span but use Robert West's path (original surveyor) for my measurements. The difference between the two (Myers and me) is within the red boxes. The frame count difference is 28-18 = 10. The distance difference is 23.75 - 12.7 = 11.05ft.