This is the PM I received from Mao last night. It seems he may know a bit about Ecutek.
Hi Nick,
You do not need to download stock tune.
We do not use romraider or ecuflash. So it will not hurt your Ecutek tune.
We are linked to tune Ecutek in Singapore and Japan, but do not work with Ecutek here due to their current policy of us having to share our tunes.
Just let Dave know that the factory
ecu Rom ID has not been altered in anyway, so with his Ecutek cable, he can accurately read the rom ID and can contact Brett Middleton @MRT direct for the factory base map before retuning.
I have an agreement with Brett not to interfere with Ecutek here, so just pass the above info on and you will be on your way for your new Ecutek tune.
Cheers,
Mao
Edit: Car was retuned by Lane at Racetorque with Ecutek, with no issues.