The cache is not at the posted co-ordinates because that would be silly. It is within 2 miles though.
Consider the following and work out where it is:
A = GC3XF2C
B = GC116J5
C = GCTKDP
D = GC3XF1R
E = GC3CRCK
F = GC3XF00
G = GC16NEH
H = GCZ1KZ
I = GC3CREW
The cache is at N 51 12.X W0 41.Y
where X = (H-C) - (G-B) and Y = (I-E) + (D-F) - (A-D)
