As promised, here is my setup for 17.5T boosted using the LRP X12 motor and Speed Passion GT2.0 Pro with 323Stock software.

That LRP X12 is really a pain. It gets hot no matter what you do. You can gear it anywhere between FDR 6.0-10.5 and it still gets hot (100+ deg C is "normal"). You really need to find the sweet spot for your way of driving, which is why I actually post 2 setups here.

The first is my own setup. I drive quite "smooth" and not to much on the throttle. The other setup is my teammate's setup. He is a lot more on the throttle than I am, so he can't use my setup.

The motor(s) gets around 75-80 deg Celcius after a 5 min heat.

A note for those who wish to use the LRP X12 for boosted: Use the 4-dot insert unless you want to buy a new motor very soon!