Aw Charlie P you are breaking one of the cardinal rules of aviation....with lesson number one....the 4 useless things in aviation.....
1. runway behind you
2. altitude above you
3. airspeed you don't have
and finally
4. fuel in the fuel truck, or in our case fuel in the fuel jug......LOL.....

As everyone has said an additional 2 oz in tank size will be ok....the problem with bigger tanks is weight of the fuel, but more important is airspace that needs to be filled with exhaust...the engine will only put out so much exhaust.....if the tank is so big that you don't fill the void you can have fuel flow problems....causing dead sticks

good flyin to all