Cheers Max! Ordered plugs last night so they coming. When I swapped the coils I left the plug in the cap, in just in case. Yes, 'suspect' coil produced a spark on the 'good' horizontal cylinder.(Thanks for advice on not to sandpaper terminals - too late! Ha! That's first thing I did! Why shouldn't you sandpaper them?) But only had spark on the one cylinder. I've done a continuity test from suspect coil wires back to connector box and they ok. Then wires go into PGM. Can I test through the PGM? Is there a wiring diagram any where?

I'm not a mechanic by any stretch of the imagination, just keen and frustrated amateur. I like things like seized bolts that I can hit with something! Ha! Anyone got one of those machines they have on Star Trek that you just wave over the offending item and all is fine and dandy?!