I did check the RPi3 spec sheet and the numbers are correct. As for the 25.62: the lighting over my work area was dimmed from a dead bulb and i could'nt see that the caliper wasn't properly lined up haha. My bad.

I would like to thank everyone who has been helping me with this complete this project. I've learned quite a bit more than i thought i knew from my father. Biggest lesson i learned: dont FULLY trust SketchUp lol