The main thing that will guide your diagnosis is whether it is pretty
consistently the same amount out, or whether the amount and direction of inaccuracy is random. If it is consistent, then maybe Atmos is right, and
the half hour is the problem. If it is random, then most likely either you are not following the procedure to the letter,[which I doubt], or there is a fault in the HC. I've had a couple of Evolutions, and found that the target was
always within the field of a low power EP.
raymo
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