Thanks guys, I should point out though that the second shot was done with my new intervalometer and not with me sitting next to the camera taking each exposure.
Dave, when I was watching Startrails process and stack the images my first thought was "GEE! Thats a bright Orionid!" Then came the realisation that yeah it was either a plane or helicopter. Oh well. Was hoping to give it another try tonight but its pretty much clouded over in Sydney.
Here is a time lapse video of all 473 shots rendered to 15fps. Can't believe all that time only equates to 32 seconds of footage! Added a little music to it which freakily matched things happening in the video.
https://vimeo.com/51841123