I am pulling focus on a car commercial next week and would like tips on how to stay sharp.. the last time I was stuck in the trunk of a car since the director, car driver and camera operator took up the 2 front seats of the car. I was given an unreliable LCD, we were on the 4.7X Angenieux and I could tell the size of the lens off my FIZ but that's about all the info I could get. Are there any tricks on pulling focus through monitors? Any tips, info, stories welcome, thanks.