Having some of the Rx antenna wire in the fuse is not in itself a problem. Most giant scale planes have the whole antenna within the fuse. You don't however want any extra wire to be coiled up or doubled over on itself as this can affect the range. On my .40 - .60 size planes, I usually use a rubber band for strain relief from the top of the fin and let the extra wire dangle behind. If you feel there is a chance of it getting caught in the control surfaces then seal them with MonoKote or whatever so the wire can't possibly get in between. So far I've never had a problem with that.