Push button start

[Eeyore]

More than likely the start button that did this.

I think because of the heat, some of my insulator tape warmed up and came loose, shorting the wires, causing it to crank.

With hindsight, i should have wired the crank button into switch live. But it was 1am when i wired it up.

Itll be fine as long as you dont wire it to a live and insulate it properly. I wouldnt particularly bother. The way they do it in mighty mods is the way it should be done so you have to turn the key and then press the button. That shouldnt invalidate your insurance either as you still need the key!