What are some of the easy things to take out and put back in after a track day? Rear seats (30lbs?), Subs (75 lbs?), Spare Tire & Jack (25lbs?). Those are the easy ones I can think of off the top of my head. Every 100lbs off is .1 off your time, not a whole lot but that stuff just there I figure is 130lbs. Any suggestions or am I wasting my time all together?