[michael lang]

All things considered, I think your best bet is go through your car using a thorough tech inspection form. Make whatever corrections need to be made to make your car safe and compliant according to the tech sheet and flush the brake fluid. If your pads are below 50%, then you might want to have a spare set just in case you need them. I don't know if you are getting started in this hobby and this is one of just a handful of events or if you have been doing this for awhile and are not sure what to do to take your skill set to the next level.
Based on your questions, I'm reading that as you are just getting started in this hobby. I say welcome aboard, I think and I believe most here would agree, you are about to have the ride of your life. This hobby is so much fun!! In all seriousness, there's nothing wrong with doing upgrades to your car, that is one of the fun parts about this but don't focus so much on it right now. Just go out and have fun with it. Believe me, if you stay with it, you will be looking for every single thing that you can do to figure out have to save that 1/2 second a turn that we all try to trim off our lap times which will include spending ridiculous amount of money on your car to make it brake later, accelerate harder, have higher top speed, be lighter, etc... I hope you have the time of your life at VIR and that you keep doing DE's.