I recently rebuilt an F-4 which someone trashed years ago. I don't know what kit it is or any setup information. The plane is prop driven. I've installed a .75 engine. Has spring air retracts and some kind of oleo struts. The dimensions are: Wingspan 48 1/2" Legnth 57" (including spinner) Wing is 20" at the root. Weight is 9 lbs and features a fiberglass fuselage, balsa sheeted foam wing, solid balsa stab & vertical. The pushrods and actuators for the rudder and stabilator are internal, covered by a fiberglass tailcone. I'm trying to locate someone who may be familiar with this kit to obtain the correct CG ang control throws. It may be from the late 80's to 1990. Any help would be appreciated. Pic attached.

Michael