Thanks Bigted and Mark.

First thing this morning changed to another module, a little improved spark, then used a snipped down card, same as you showed above Mark (penny finally dropped).
Pleased I didn't start drilling over sized holes, did realize there is enough play in original holes to allow such a small adjustment. This made another improvement in the sparks frequency, and probably would have been able to start engine with pull cord, but still not that evasive 'big blue spark'.
Studied how to check with multimeter last night, so tested with multimeter and found the primary coil was 10,930 ohms. Went to my Powerplus engine coil and checked that, was 6,060 and secondary OK. Cleaned the faces, gaped..... and Bingo! Big Blue Spark!!
Naturally put that on the Super and can now honestly join the 'Fist Pull Start Club"...from cold.

[Linked Image]

Needless to say am very happy with the outcome and should finish assembly tomorrow.