Scott has agreed that he arbitrary used a 42 degrees angle. With this angle as I have checked doing the math the dimensions of G2 and G3 match(Lehner data). But the derived G1 base length is too large. This is a geometric solution so 3% error cannot be accepted. Whether G3 is square or not doesn't really matter. The actual dimensions of the Gizamids cannot be accurately derived from this plan. The fact is though that this plan helped me come up with my own planetary blueprint, so I thank Scott for this.