Down sizing gas tank

[jorgeinmiami]

In preparation for the new 4 stroke I was thinking I would take out the 70 gallon tank and replace it with a new 50? gallon tank and install it all the way forward where the 70 is now to help any center of gravity issues that may happen with the newer heavier engine.
With the better gas mileage you get with the 4 stroke I may not need the larger tank and I don't plan on going anywhere that far on the 20 anything soon.

Any opinions?