You said you have the battery forward but never said whether you meant forward in the radio compartment or forward in the nose compartment up to the firewall. If it is not all the way aginst the firewall under the tank then that is where it should be and do not add any weight untill you,ve moved it there. If there is no access then make a hatch, If the switch cord is to short then us a 6 inch extension.

Also do not move the gear forward from where you have it in an attempt to balance. That will make the airplane very bouncy on landings and difficult to land (even less directional stability). The gear has to stay in a given range of the target CG.


John