Thanks for the email Dave!
I'll be testing the ported theory later on this year myself. Personally, I think the cermaic coating gives more benefit for the cost. But we will see.
At the moment I have 180+kW ATH on the ASG dyno without touching the turbo. Previously with less power and torque I was getting 13.1 qtr miles at around 103mph (with a fat GD too). Hoping to improve on that next drag season.
I personally think the TD04 is underrated for most peoples uses which is why I'm exploiting it as much as possible.
Going through the Nasioc forums, I'm yet to see anyone with the Deadbolt TD04 (P&P) show any significant gains for the cost. When you are looking at ~$600+ shipping, ceramics etc, a VF35 looks more tempting.
I think with just the stock TD04 + tune you will get some excellent gains without having to go the port and polish route.
Food for thought.