Thanks Stoker.
I've been struggling to upload a video, but seem to have got it now. Here is the engine running on the lash up igntion system. It is not finished yet and needs a 400v capacitor to replace the 100v one the spark stove ignitor came me with. Nevertheless it is working as you see and I think it is very easy to start up. The new capacitor will come tomorrow I think and I will also properly insulate the high tesnion parts, especially the coil because they may spark over and develop a tracking failure like I suspect killed the original unit.