Well, I had partial repeated sucess last night, the really important thing seemed to be the volume, I had done previous autoeqs at a comfortable listening volume, this seems to be too much, either that or my idea of comfortable listening volume is too loud. Anyway, I turned it down and tried it and managed three or four reasonable runs, a few minor clicks and pops but nothing too bad.

I'll run it again when I get round to replacing my knackered HF driver. Should be some interesting results, the curve I got certainly sounds good, but my imaging is currently way off track.