As a wing, you should nail your spots from the G to the G on every down, you can't just turn it on and off as to when you are going to get a good spot. If you go into the game thinking you only have to get good spots when you are inside the 20's, you are going to miss a lot of spots.
The spot is where the spot is, if it is on a tick, it is on a tick, if its not.. oh well. If you work to be perfect all the time you will be closer to perfect when you have to be perfect, let the U make the decision if he wants to move it 3 inches to a tick.
Sure, be on a tick on long gains for first downs, but on plays that don't end well past the LTG make your spot the right spot.