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The output strangely has the north arrow pointing south (I am using 5.2.6 - however older datasets seem to process OK so >far).
The fixed points and the surface image are aligned almost perfectly, but the grid appears to be about 10m too far north >relative to the fixed points and surface image.
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Problem solved. I discovered that I had entered co-ordinates 2000km too far north, so outside the valid range for this co-ord system. My scruffy topo map had 6's that looked like 8's. I guess when the log file says "meridian convergence (deg): 175.85" You know there's got to be a positioning problem, as it seems to hover around +-few degrees usually. So I'll concede Therion is working perfectly and user error is to blame! Apologies Bruce