[wilf leek]

Tim - cam break in results in some pretty hot engines for most people, yours does not sound exceptional.

killing the ignition as you did also often results in a "boil up" - cooling system is at it's top limits, then you remove flow from the engine - hot spots cause boiling and voila - geyser.

Ditto run-on. Later, if the engine still runs on after it has been at normal temps and ticking over for a while you might want to investigate further. My own engine runs on like a pig if I kill the ignition when it has gotten good and hot and from those kind of revs, never does it otherwise. Thinking about some cooler plugs.

A quick fix for your un-beaded coolant pipe is to drill some holes around the periphery and thread some welding or brazing rod of about 2-3mm dia in and out of the holes - instant bead. Worked for me as a quick fix originally (for I lost all my coolant in the same way on initial start up) and is still in place today.

Otherwise, sounds like you had fun.