X3 on the boost gauge and maintenance. The only way to learn is to do it.
Lambo doors are really awesome looking.....if it's a fun car to drive for leisure. They are a pain in the butt for a daily driver. They open only enough to squeeze in without lifting, they suck to get into when it's raining, and yes, you hit your head

They do look SICK, though.
Don't get me wrong, I have always compromised comfort for style. Big rims, low profiles, slammed to the ground (car), massive tires, huge lift, rough ride (jeep), Stretched frame, slammed, wide tire (show bike), etc.

So, I understand where you're coming from.
Have fun building your car, and gaining experience while doing it. It's an awesome hobby! :san: