How about a 15 Cent Allen Screw? A 3/16 inch long, 4-40 Allen screw added to the trigger just below the trigger mounting cross pin will do the trick for that pre-travel problem.
Me, I only installed a VQ sear and VQ target trigger (after I modified it with a pre-travel screw, of course). I found the rest of the VQ accurizing kit is redundant, in my opinion. I didn't need a new hammer but I can understand those who feel the need to add this component too.