Building medium size mahogany book case, and was placing shelf pin holes using 2 1400 mm LR 32 rails connected with festool connector rods. At the connection point between the first rail and the second the hole spacing drops two about 24 mm not 32. Using 16 up and out when I flipped rail to do back side holes was off 8mm. expensive mistake. I was under the impression two of these rails could be connected to make a long 32 mm hole rail. Looks like not so much. Thoughts