Kelly, I know my boat (Top gun, not a Tiger) is significantly faster on light fuel. I think it's more of a COG thing than a weight issue. It also planes a lot quicker on light fuel.

Ok, that makes sense because the way it pulls on the trailer with tanks full vs tanks half full is daylight/dark. With tanks half full at speeds over 70 (on the trailer) the tail wants to wag the dog because of insufficient tongue weight. Fill the tanks up and it's a completely different animal.
I don't know why I never thought to apply the same principle to the boat running in the water. Thanks for pointing that out Justin. You may have just found my missing mph.

I'm only running about 7-8 pounds of boost but I'm trying to make theses things live a while without catastrophic failure. Having said that I know I could swing bigger wheels with additional boost so that is an option.

I'm feelin' pretty sharp for a Monday!

Yes, which proves you did not go to Key West. I'm still trying to get rid of the cobwebs. The 4 day stopover in Vero Beach on the way home didn't help matters at all.