DON'T mess with the autoupdate.
I think this was for any future firmware updates to the head. NOT for config settings.
When I first got the GT1, I mistakenly thought that to update the settings I had to do this.
I think that you may be having the same problem that I had with the config settings.
All your problems sound familiar to me. I will try and recap how I resolved when I have some time. Too much going on at the moment.

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