Worked out the problem with the camera not recording. lot of people have had the problem with all brands of cameras, When the camera gets to hot its safety system kicks in and stops recording and on some cameras powers off the camera.
Camera gets warm just on my desk recording and stopped after 22 mins running just on the battery. So I removed battery and that was warmer then camera. Plugged in the USB cable and up the power pack and started recording again and got 14 mins before it stop. I think that is because it is running and charging the battery at the same time. So removed the battery and run the camera off the USB to power pack and recorded for 45 mins and I turned it off. Going to run it again tomorrow just to make sure it runs fine just on the power pack for a couple of hours.
Oh and because I drilled and cut the holes in the bottom of the case the mic picks up the engine sound better. Not so muted now. Uploading new video at moment.