Set the CG per the plans. Don't worry about percentage of weight is on each wheel.
The CG as called for in the plans is just a starting point anyway. Go fly and set CG to your preference.
remember that a tail heavy airplane will be sensitive in pitch if flyable at all. A nose heavy airplane won't want to slow down on approach nor will it flair.
you want the airplane to set level or slightly nose down when balanced on the CG. With an empty full tank