Some of the weight is in the Batteries at 666g x 2 puts you at 1332 and that is very heavy, You can get the 15c packs that are lighter
or go with the F3A Unlimites packs that weigh 1188 that will save 5 oz.. But not sure on the other weight you need to get rid of..
What do the wings weigh RTF? and then the fuse.. maybe we can see where the weight is a problem. I can let you know
the weights of my planes to give us a starting point