Trifecta told me the site for Trax was going under construction but the info for Sonic was pretty much the same.
I haven't ordered yet but they will calibrate for completely stock and then you can run 87-93 octane with 91 or higher giving you the best performance.
There are not many aftermarket performance parts for Trax on the web but you could easily make up a CAI for it.
I will leave the exhaust stock as I don't want it any louder as my wife drives it mostly.
So the way I read the power gains around 44WHP and 51 Ft lbs tq. Are gained
I think these are peak gains using premium fuel(93)
As far as filling out the form I would fill out each line with the required info and where it says intake I would put stock as well as exhaust stock.
No ethanol calibration needed as this would require larger injectors and running E85 which I am guessing you are not.
For select a tune choose cruise button.
For No lift shift select NO as this requires manual transmission.
The select a tune by turning on and off the cruise button is a great way to go from stock to tuned at a flip of the switch. Kinda cool.
You can submit an inquiry form and they should be able to answer most questions for you.
You will need a laptop with Windows 7 or newer to install your tune.
it will seem kinda scary the first time, but I have tuned many for family and friends and it is like brushing my teeth now.
Even my son after tuning his first time said this is way easy.