Thanks very much for the advice Peter. I have made the tools, and and tried again. The lead screw seems to be moving with the drum correctly . A clunk at top and bottom of travel (64 clicks)followed by 14 clicks before the reticle starts to move and then only slightly for a few clicks then on to 64 clicks with 1MOA movement per click. With the locking ring loose, and the lead screw at stop(bottom or top)the lead screw needs a just over a quarter turn before the reticle starts to move. As if the threads are worn at either end or the scale or perhaps play between the diaphragm nut and the erector cell?.
Is there an exploded diagram for the Mk2 showing this mechanism or is it easier just to remove the turrets and have a look?.
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