Thanks SK, your right, it is flat for a few hundred rpm, then it pulls well.
As a result, will advancing the timing put my GTT at risk of anything? dont want to be blowing things up. I would much rather doing this as it is cheap, and then if this doesnt work, a SAFC might be necessary.
I heard advancing the timing is not good if you dont know what you are doing, but as you said, does the factory ECU have protection modes that will prevent this?