If you balance on the spar, you will be 1-1/4” off the forward limit; hence, the model will be way nose heavy and it will not fly well, making flaring and take-off’s difficult or impossible.

Just add weight as far back as possible and rebalance to 5-11/16” behind the LE at the fuse.

An overpowered model is seldom light.

A heavy model will always fly better than an improperly balanced one.

Your model should not be too nose heavy as to locate the balance point forward than 4-15/16” behind the LE at the fuse.

Your model should not be too tail heavy as to locate the balance point aft than 6-7/16” behind the LE at the fuse.

Good luck!